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333 results on '"European Laboratory for Non-Linear Spectroscopy (LENS)"'

1. Time-domain THz spectroscopy of the characteristics of hydroxyapatite provides a signature of heating in bone tissue

Author: Mariana Verezhak, Paolo Bartolini, Christian Rey, Aurélien Gourrier, Renato Torre, Christèle Combes, Marie Plazanet, Andrea Taschin, Alessandro Di Michele, J. Tasseva, Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères] (LIPhy), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Dipartimento di Fisica e Geologia [Perugia], Università degli Studi di Perugia (UNIPG), European Laboratory for Non-linear Spectroscopy (LENS), LENS - Università di Firenze, Dipartimento di Fisica, Università di Firenze (Dipartimento di Fisica, Università di Firenze), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Grenoble Alpes - UGA (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Università degli Studi di Firenze (ITALY), Università degli Studi di Perugia - UNIPG (ITALY), European Laboratory for Non-Linear Spectroscopy - LENS (Florence, Italy), and Institut National Polytechnique de Toulouse - INPT (FRANCE)
Subjects: Bone tissue, lcsh:Medicine, 02 engineering and technology, Thermal treatment, Biochemistry, 01 natural sciences, Diagnostic Radiology, law.invention, [SPI.MAT]Engineering Sciences [physics]/Materials, chemistry.chemical_compound, Spectrum Analysis Techniques, X-Ray Diffraction, law, Medicine and Health Sciences, Scanning, Crystallization, Time-domain THz spectroscopy, lcsh:Science, Density Functional Theory, Bone mineral, Microscopy, Crystallography, Multidisciplinary, Physics, Radiology and Imaging, Classical Mechanics, Calcium pyrophosphate, Absorption Spectroscopy, Tetracalcium phosphate, Condensed Matter Physics, 021001 nanoscience & nanotechnology, Bone Imaging, Chemistry, medicine.anatomical_structure, Physical Sciences, X-ray crystallography, Crystal Structure, [PHYS.PHYS.PHYS-MED-PH]Physics [physics]/Physics [physics]/Medical Physics [physics.med-ph], Phonons, [SDV.IB]Life Sciences [q-bio]/Bioengineering, 0210 nano-technology, THz spectroscopy, Bone tissue, Research Article, Materials science, Imaging Techniques, Bone and Mineral Metabolism, Matériaux, Structural Characterization, Research and Analysis Methods, Vibration, Electron, Bone and Bones, Phosphates, 010309 optics, Heating, Diagnostic Medicine, 0103 physical sciences, medicine, Solid State Physics, Animals, Particle Physics, Terahertz Spectroscopy, lcsh:R, Collective Excitations, Chemical Compounds, Biology and Life Sciences, Synthetic calcium-phosphates, Terahertz spectroscopy and technology, X-ray diffraction, Metabolism, Durapatite, chemistry, Chemical engineering, Microscopy, Electron, Scanning, lcsh:Q, Cattle, DFT-normal modes calculations
Abstract: International audience; Because of the importance of bone in the biomedical, forensic and archaeological contexts, new investigation techniques are constantly required to better characterize bone ultrastructure. In the present paper, we provide an extended investigation of the vibrational features of bone tissue in the 0.1-3 THz frequency range by time-domain THz spectroscopy. Their assignment is supported by a combination of X-ray diffraction and DFT-normal modes calculations. We investigate the effect of heating on bone tissue and synthetic calcium-phosphates compounds with close structure and composition to bone mineral, including stoichiometric and non-stoichiometric hydroxyapatite (HA), tricalcium phosphate, calcium pyrophosphate and tetracalcium phosphate. We thus demonstrate that the narrow vibrational mode at 2.1 THz in bone samples exposed to thermal treatment above 750 °C arises from a lattice mode of stoichiometric HA. This feature is also observed in the other synthetic compounds, although weaker or broader, but is completely smeared out in the non-stoichiometric HA, close to natural bone mineral composition, or in synthetic poorly crystalline HA powder. The THz spectral range therefore provides a clear signature of the crystalline state of the investigated bone tissue and could, therefore be used to monitor or identify structural transitions occurring in bone upon heating.
Published: 2018
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2. Light diffusion in strongly heterogeneous media with quenched disorder

Author: SVENSSON, Tomas, VYNCK, Kevin, ADOLFSSON, Erik, FARINA, Andrea, PIFFERI, Antonio, WIERSMA, Diederik S., European Laboratory for Non-linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), lp2n-03,lp2n-13, Laboratoire Photonique, Numérique et Nanosciences (LP2N), Université Sciences et Technologies - Bordeaux 1-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS), Institut Langevin - Ondes et Images (UMR7587) (IL), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), European Laboratory for Non-Linear Spectroscopy (LENS), Ceramic Materials, SWEREA IVF, CNR Istituto di Fotonica e Nanotecnologie [Milano] (IFN), Consiglio Nazionale delle Ricerche [Roma] (CNR), Dipartimento di Fisica, and Politecnico di Milano [Milan] (POLIMI)
Subjects: [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMethodologies_GENERAL
Abstract: Poster presentation
Published: 2014

3. Light diffusion in quenched disorder: role of step correlations

Author: Andrea Farina, Diederik S. Wiersma, Antonio Pifferi, Erik Adolfsson, Kevin Vynck, Tomas Svensson, European Laboratory for Non-linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Institut Langevin - Ondes et Images (UMR7587) (IL), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), European Laboratory for Non-Linear Spectroscopy (LENS), Ceramic Materials, SWEREA IVF, CNR Istituto di Fotonica e Nanotecnologie [Milano] (IFN), Consiglio Nazionale delle Ricerche [Roma] (CNR), Dipartimento di Fisica, Politecnico di Milano [Milan] (POLIMI), Istituto Nazionale di Ottica (INO), Consiglio Nazionale delle Ricerche (CNR), and Swedish Research Council (postdoctoral fellowship Grant No. 2010-887), LASERLAB-EUROPE (Grant Agreement No. 284464)
Subjects: Ceramics, Materials science, Scale (ratio), Light, random media, Monte Carlo method, Statistics as Topic, Thermal diffusivity, Nanopores, Nephelometry and Turbidimetry, Materials Testing, Scattering, Radiation, Computer Simulation, light transport, Photon diffusion, ComputingMilieux_MISCELLANEOUS, scattering media, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Macropore, Condensed matter physics, Random media, Models, Theoretical, Porous ceramics, Nanopore, Porosity
Abstract: We present a theoretical and experimental study of light transport in disordered media with strongly heterogeneous distribution of scatterers formed via nonscattering regions. Step correlations induced by quenched disorder are found to prevent diffusivity from diverging with increasing heterogeneity scale, contrary to expectations from annealed models. Spectral diffusivity is measured for a porous ceramic where nanopores act as scatterers and macropores render their distribution heterogeneous. Results agree well with Monte Carlo simulations and a proposed analytical model.
Published: 2013
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4. Soft Nano‐Imprint Lithography of Rare‐Earth‐Doped Light‐Emitting Photonic Metasurface

Author: Zeinab Chehadi, Michele Montanari, Nicoletta Granchi, Mehrnaz Modaresialam, Mathieu Koudia, Mathieu Abel, Magali Putero, David Grosso, Francesca Intonti, Marco Abbarchi, Institut des Matériaux, de Microélectronique et des Nanosciences de Provence (IM2NP), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence (UniFI), ANR-18-CE47-0013,OCTOPUS,Qubits de spin adressables optiquement dans le silicium 28(2018), ANR-15-CE24-0027,ULYSSES,Émetteurs de lumière quantique et classique en silicium: Impuretés et défauts complexes pour la nanophotonique(2015), and European Project: 828890,NARCISO
Subjects: [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], [CHIM]Chemical Sciences, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Abstract: International audience; Sol–gel chemistry and nano-imprint lithography (soft-NIL) can be combinedfor the fabrication of nano-patterns with large vertical aspect ratio over largescales. The possibility to frame via soft-NIL metal oxides materials featuringa large refractive index and low absorption coefficient, opens new avenues forlight management. In spite of its importance, the integration of light emittersin these materials has been mostly investigated in flat layers, limiting theirefficiency and versatility. Here it is shown that ZrO 2 can be combined withlight emitting Eu 3+ ions and framed via soft-NIL to form large arrays of pillarsatop a 2D residual layer. The chemical precursor solutions and the nano-imprint technique are developed for photonic metasurfaces sustaining sharpresonances ascribed to quasi-guided modes and lattice modes, as accountedfor by finite difference time domains simulations. These resonances enablefor a record extraction of the Eu 3+ forward emission up to ≈200 times withrespect to the flat counterpart within a relatively small detection angle (≈ ±16°around the vertical direction). These results are relevant for light-emittingdisplays, down- and up-conversion processes for light detection such as scin-tillators for X-ray and for light amplifiers based on rare-earth emitters.
Published: 2022
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5. Addressing Charge‐Transfer and Locally‐Excited States in a Twisted Biphenyl Push‐Pull Chromophore

Author: Olivier Mongin, Francesca Terenziani, Elisa Campioli, Agnese Marcelli, Mariangela Di Donato, Mireille Blanchard-Desce, Anna Painelli, Somananda Sanyal, ISM Institut des Sciences Moléculaires, University of Parma = Università degli studi di Parma [Parme, Italie], European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Institut des Sciences Moléculaires (ISM), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), RBFR10Y5VW, Italian Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR), DM 11/05/2017 n. 262, 'Dipartimenti di Eccellenza', 812872, European Union's Horizon 2020 research and innovation programme, HPC (High Performance Computing) facility of the University of Parma, Italy, Università degli studi di Parma [Parme, Italie], Università degli Studi di Firenze = University of Florence [Firenze], Synthèse et électrosynthèse organiques (SESO), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Molecular Materials for Advanced Applications (MMAA), Università di Parma-INSTM-UdR Parma, Università degli studi di Parma = University of Parma (UNIPR), Università degli Studi di Firenze = University of Florence (UniFI), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1 (UB)-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: theoretical modelling, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, time-resolved spectroscopy, Spectral line, Photoinduced electron transfer, Ultrafast laser spectroscopy, [CHIM]Chemical Sciences, Molecule, Physical and Theoretical Chemistry, ComputingMilieux_MISCELLANEOUS, Physics, solvation dynamics, Solvation, Charge (physics), Chromophore, electron transfer, dual fluorescence, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, 0104 chemical sciences, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, Chemical physics, Excited state, 0210 nano-technology
Abstract: International audience; We present the synthesis and spectroscopic characterization of a twisted push-pull biphenyl molecule undergoing photoinduced electron transfer. Steady-state and transient absorption spectra suggest, in this rigid molecular structure, a subtle interplay between locally-excited and charge-transfer states, whose equilibrium and dynamics is only driven by solvation. A theoretical model is presented for the solvation dynamics and, with the support of quantum chemical calculations, we demonstrate the existence of two sets of states, having either local or charge-transfer character, that only "communicate" thanks to solvation, which is the sole driving force for the charge-separation process.
Published: 2019
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6. High-Pressure Synthesis and Gas-Sensing Tests of 1-D Polymer/Aluminophosphate Nanocomposites

Author: Marco Fabbiani, Frederico G. Alabarse, Michelangelo Polisi, Giulia Zambotti, Francesco Di Renzo, Boby Joseph, Andrea Ponzoni, Vittorio Ferrari, S. Quartieri, Julien Haines, Rossella Arletti, Marco Baù, Marco Ferrari, Francesco Capitani, Mario Santoro, Leszek Konczewicz, Sylvie Contreras, Jérôme Rouquette, Bruno Alonso, Elettra Sincrotrone Trieste, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Università degli studi di Torino (UNITO), Università degli Studi di Modena e Reggio Emilia (UNIMORE), Dipartimento di Scienze della Terra [Torino], Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Laboratoire Charles Coulomb (L2C), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Istituto Nazionale di Ottica (INO), Consiglio Nazionale delle Ricerche (CNR), Università degli Studi di Brescia [Brescia], European Laboratory for Non-Linear Spectroscopy (LENS), and Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI)
Subjects: gas sensing, Nanostructure, Materials science, aluminophosphate, polymer, Composite number, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Diamond anvil cell, Crystal, chemistry.chemical_compound, nanocomposites, General Materials Science, chemistry.chemical_classification, Nanocomposite, high-pressure synthesis, Polymer, 021001 nanoscience & nanotechnology, 0104 chemical sciences, [CHIM.POLY]Chemical Sciences/Polymers, Phenylacetylene, chemistry, Chemical engineering, Polymerization, 0210 nano-technology
Abstract: International audience; Recently, filling zeolites with gaseous hydrocarbons at high pressures in diamond anvil cells has been carried out to synthesize novel polymer-guest/zeolite-host nanocomposites with potential, intriguing applications, although the small amount of materials, 10–7 cm3, severely limited true technological exploitation. Here, liquid phenylacetylene, a much more practical reactant, was polymerized in the 12 Å channels of the aluminophosphate Virginia Polytechnic Institute—Five (VFI) at about 0.8 GPa and 140 °C, with large volumes in the order of 0.6 cm3. The resulting polymer/VFI composite was investigated by synchrotron X-ray diffraction and optical and 1H, 13C, and 27Al nuclear magnetic resonance spectroscopy. The materials, consisting of disordered π-conjugated polyphenylacetylene chains in the pores of VFI, were deposited on quartz crystal microbalances and tested as gas sensors. We obtained promising sensing performances to water and butanol vapors, attributed to the finely tuned nanostructure of the composites. High-pressure synthesis is used here to obtain an otherwise unattainable true technological material.
Published: 2021
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7. Monoclinic–Orthorhombic Phase Transition with a Positive Volume Change in the Siliceous Zeolite Mobil-Five Induced by the High-Pressure Insertion of Dense Fluid Helium

Author: Julien Haines, Mario Santoro, Konstantin Glazyrin, Weiwei Dong, European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Deutsches Elektronen-Synchrotron [Hamburg] (DESY), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), and Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)
Subjects: Diffraction, Phase transition, Materials science, Analytical chemistry, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, law.invention, Degree (temperature), law, [CHIM]Chemical Sciences, ddc:530, Physical and Theoretical Chemistry, Zeolite, Helium, ComputingMilieux_MISCELLANEOUS, 021001 nanoscience & nanotechnology, Synchrotron, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, General Energy, chemistry, Orthorhombic crystal system, 0210 nano-technology, Monoclinic crystal system
Abstract: The journal of physical chemistry / C 125(43), 24249 - 24253 (2021). doi:10.1021/acs.jpcc.1c07791, Synchrotron X-ray diffraction was used to investigate the insertion of helium in the archetypal siliceous zeolite Mobil-Five (MFI). Due to the very high degree of helium penetration into the pores and the framework, the monoclinic form of MFI is stabilized over a large pressure interval, and the compressibility is much lower than when the pores are empty or filled with any other guest molecules or atoms except hydrogen. The structure of MFI transformed from monoclinic P2$_1$/n to orthorhombic Pnma with a discontinuous volume increase of 3% at pressures close to 10 GPa due to the filling process. The material is highly strained at pressures above 42 GPa but remains crystalline. The strain is released on decompression and a highly crystalline material is recovered., Published by Soc., Washington, DC
Published: 2021
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8. Nanoscale Light Confinement: the Q's and V's

Author: Philippe Lalanne, Massimo Gurioli, Tong Wu, Laboratoire Photonique, Numérique et Nanosciences (LP2N), Université de Bordeaux (UB)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS), European Laboratory for Non-Linear Spectroscopy (LENS), and Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI)
Subjects: cavity perturbation theory, 02 engineering and technology, Space (mathematics), 01 natural sciences, LDOS, Resonator, Quality (physics), Quantum mechanics, 0103 physical sciences, strong coupling, Spontaneous emission, Electrical and Electronic Engineering, 010306 general physics, Optomechanics, Physics, Mode volume, quasinormal mode, plasmonic nanocavities, 021001 nanoscience & nanotechnology, Hermitian matrix, Atomic and Molecular Physics, and Optics, microcavities, Electronic, Optical and Magnetic Materials, Phase factor, non-Hermitian systems, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, 0210 nano-technology, Biotechnology
Abstract: International audience; Microcavities and nanoresonators have the ability to strongly enhance many light−matter-interaction processes used in various applications in nano-optics. This enhancement is due to the resonant excitation of an electromagnetic mode that confines light in space (mode volume) and in time (quality factor). The confinement is not perfect and the modes, even dark ones, always leak some energy and have a finite lifetime. Their non-Hermitian character does significantly more than merely broadening the resonances. In this Perspective, we clarify the main difference between bound modes of Hermitian systems and leaky modes of non-Hermitian resonators, emphasizing the key existence of a spatially dependent phase factor as a signature of nonhermiticity. For decades, the phase factor has often be considered as puzzling or has even be ignored, although it plays a key role in the interpretation of many experiments on nanoscale resonant-mediated light−matter interaction, such as sensing with cavity perturbation, modification of the spontaneous emission rate, optomechanics, strong coupling, and so on. The situation has changed recently, to a point that nowadays a sound non-Hermitian formalism has been developed and freeware packages exist, helping analyze experiments that continuously push back the extraordinary limit offered by large fields for exploring matter with light.
Published: 2021
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9. Insertion of Oxygen and Nitrogen in the Siliceous Zeolite TON at High Pressure

Author: Marta Morana, Kamil Dziubek, Mario Santoro, Roberto Bini, Gaston Garbarino, Demetrio Scelta, Federico A. Gorelli, Julien Haines, Francesco Di Renzo, Arie van der Lee, Jérôme Rouquette, Benoit Coasne, European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), European Synchroton Radiation Facility [Grenoble] (ESRF), Institut Européen des membranes (IEM), Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM), Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères] (LIPhy ), and Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)
Subjects: Materials science, chemistry.chemical_element, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 01 natural sciences, Nitrogen, Oxygen, Diamond anvil cell, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, General Energy, Chemical engineering, chemistry, High pressure, 0103 physical sciences, Ton, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], Physical and Theoretical Chemistry, Diatomic molecules, Filling behavior, Orientational orderings, Oxygen and nitrogens, Per unit, Pore system, Siliceous zeolite, 010306 general physics, Porous medium, Zeolite, ComputingMilieux_MISCELLANEOUS
Abstract: The insertion of oxygen and nitrogen molecules in the one-dimensional (1D) pore system of the zeolite TON was studied at high pressure by vibrational spectroscopy, X-ray diffraction, and Monte Carlo (MC) molecular modeling. Rietveld refinements and MC modeling indicate that, on average, six diatomic molecules per unit cell enter the pores of the zeolite. This induces changes in compressibility and distortion related to the Cmc21-to-Pbn21 phase transition compared to the empty-pore material. The filling behavior with N2 and O2 under pressure is similar to that of argon, suggesting that the kinetic diameter, which is very close in these three systems, plays a major role. The orientation of the diatomic molecules appears to have a rather minor effect on filling occurring at a slightly higher pressure for N2, which has a larger kinetic diameter. Both inserted molecules, initially not showing any marked orientation, begin to exhibit a degree of orientational order above 2 GPa.
Published: 2021
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10. Color Modulation in Morpho Butterfly Wings Using Liquid Crystalline Elastomers

Author: Sara Nocentini, Camilla Parmeggiani, Min-Hui Li, Bin Ni, Diederik S. Wiersma, Daniele Martella, Patrick Keller, Isabella De Bellis, Institut de Recherche de Chimie Paris (IRCP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Ministère de la Culture (MC), European Laboratory for Non-Linear Spectroscopy (LENS), and Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI)
Subjects: Scale (anatomy), lcsh:Computer engineering. Computer hardware, Materials science, biohybrid platforms, lcsh:Control engineering systems. Automatic machinery (General), lcsh:TK7885-7895, Morphology (biology), 02 engineering and technology, 010402 general chemistry, 01 natural sciences, lcsh:TJ212-225, Optics, Liquid crystal Elastomers, color modulation, Morpho Butterfly, liquid crystalline elastomers, [CHIM]Chemical Sciences, Lamellar structure, [PHYS]Physics [physics], color tuning, Wing, biology, business.industry, Morpho menelaus, Morpho, 021001 nanoscience & nanotechnology, biology.organism_classification, 0104 chemical sciences, Morpho butterfly, Photonics, 0210 nano-technology, business, General Economics, Econometrics and Finance, self-cleaning, Structural coloration, superhydrophobicity
Abstract: International audience; The study of evolutionarily optimized solutions of animals and plants is used in biologically inspired engineering to find inspiration for the development of better devices and technology. In nature, the morphology of living systems is responsible not only for the biological functions but frequently also for their appearance. A fascinating feature based on material architecture is that of structural coloration, which receives growing interest for the development of efficient reflective coatings, photonic devices, and optical sensors. [1-3] An inspiring example is provided by the nanoarchitecture of the butterfly wings. Among them, the color of Morpho menelaus [4-6] is mainly determined by the interaction of light with the wing's complex scale morphology that produces a brilliant blue structural color as a sum of multiple optical effects. A specific characteristic of this species is the low angular dependence of wing coloration that remains bluish over a wide range of viewing angles, in contrast to what is typically observed in many other structural colors. [7] This unique property motivated a profound exploration of the morphology of the wing scales that are constituted by nanostructured cover and ground scales. The scales are nanostructured in ridges with a lamellar structure
Published: 2020
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11. Toward an international practical pressure scale: A proposal for an IPPS ruby gauge (IPPS-Ruby2020)

Author: Paul D. Asimow, O. V. Fat'yanov, Stefan Klotz, Renata M. Wentzcovitch, Kamil Dziubek, Tsutomu Mashimo, Agnès Dewaele, Christine J. Wu, Guoyin Shen, Jon Eggert, Yanbin Wang, P. Loubeyre, Dayne Fratanduono, Argonne National Laboratory [Lemont] (ANL), University of Chicago, Laboratoire Matière sous Conditions Extrêmes (LMCE), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Lawrence Livermore National Laboratory (LLNL), Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Muséum national d'Histoire naturelle (MNHN)-Institut de recherche pour le développement [IRD] : UR206-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence (UniFI), California Institute of Technology (CALTECH), Kumamoto University, Department of Applied Physics and Applied Mathematics [New York], Columbia University [New York], and Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI)
Subjects: [PHYS]Physics [physics], Task group, Work (electrical), Scale (ratio), Computer science, 0103 physical sciences, Gauge (firearms), 010502 geochemistry & geophysics, 010306 general physics, Condensed Matter Physics, 01 natural sciences, Industrial engineering, 0105 earth and related environmental sciences
Abstract: At the 26th AIRAPT conference in 2017, a task group was formed to work on an International Practical Pressure Scale (IPPS). This report summarizes the activities of the task group toward an IPPS ruby gauge. We have selected three different approaches to establishing the relation between pressure (P) and ruby R1-line shift (Δλ) with three groups of optimal reference materials for applying these approaches. Using a polynomial form of the second order, the recommended ruby gauge (referred as Ruby2020) is expressed by: P[GPa]=1.87(±0.01)×103Δλλ01+5.63(±0.03)Δλλ0, where λ0 is the wavelength of the R1-line near 694.25 nm at ambient condition. In June of 2020, the Executive Committee of AIRAPT endorsed the proposed Ruby2020. We encourage high-pressure practitioners to utilize Ruby2020 within its applicable pressure range (up to 150 GPa), so that pressure data can be directly compared across laboratories and amended consistently as better scales emerge in the future.
Published: 2020
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12. In memory of Philip W. Anderson

Author: Diederik S. Wiersma, Ad Lagendijk, Bart van Tiggelen, European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Laboratoire de physique et modélisation des milieux condensés (LPM2C ), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Universiteit Twente, and Complex Photonic Systems
Subjects: 010309 optics, 0103 physical sciences, 02 engineering and technology, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], 021001 nanoscience & nanotechnology, 0210 nano-technology, 01 natural sciences, n/a OA procedure, Atomic and Molecular Physics, and Optics, Classics, Electronic, Optical and Magnetic Materials
Abstract: International audience; Philip W. Anderson is one of the founding fathers of modern condensed-matter physics. With his death on 29 March 2020, we have lost one of the most influential physicists of the twentieth century.
Published: 2020
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13. Experimental and Computational Study on Motor Control and Recovery After Stroke: Toward a Constructive Loop Between Experimental and Virtual Embodied Neuroscience

Author: Anna Letizia Allegra Mascaro, Egidio Falotico, Spase Petkoski, Maria Pasquini, Lorenzo Vannucci, Núria Tort-Colet, Emilia Conti, Francesco Resta, Cristina Spalletti, Shravan Tata Ramalingasetty, Axel von Arnim, Emanuele Formento, Emmanouil Angelidis, Camilla H. Blixhavn, Trygve B. Leergaard, Matteo Caleo, Alain Destexhe, Auke Ijspeert, Silvestro Micera, Cecilia Laschi, Viktor Jirsa, Marc-Oliver Gewaltig, Francesco S. Pavone, European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), The BioRobotics Institute, Scuola Universitaria Superiore Sant'Anna [Pisa] (SSSUP), Institut de Neurosciences des Systèmes (INS), Institut National de la Santé et de la Recherche Médicale (INSERM)-Aix Marseille Université (AMU), Institut des Neurosciences Paris-Saclay (NeuroPSI), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Neuroscience Institute [Pisa, Italy] (CNR), Pisa Research Area - National Research Council [Pise] (Italian National Research Council ) (CNR - Pisa), Ecole Polytechnique Fédérale de Lausanne (EPFL), Fortiss GmbH, fortiss GmbH, Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), University of Oslo (UiO), University Hospital of Padua, European Project: 720270,H2020 Pilier Excellent Science,H2020-Adhoc-2014-20,HBP SGA1(2016), European Project: 785907,H2020,HBP SGA2(2018), European Project: 945539,HBP SGA3(2020), Università degli Studi di Firenze = University of Florence (UniFI), Aix Marseille Université (AMU)-Institut National de la Santé et de la Recherche Médicale (INSERM), Azienda Ospedale Università di Padova = Hospital-University of Padua (AOUP), and European Project: 945539,H2020,H2020-SGA-FETFLAG-HBP-2019,HBP SGA3(2020)
Subjects: Computer science, computer.software_genre, Constructive, 0302 clinical medicine, brain network models, closed-loop simulation, Kuramoto oscillators, motor control, neural mass, rehabilitation, spiking neuronal networks, stroke, Premovement neuronal activity, Original Research, 0303 health sciences, Computational model, Replicate, organization, simulation, Motor rehabilitation, medicine.anatomical_structure, mathematical-models, oscillations, Connectome, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], spinal-cord, Cognitive Neuroscience, Neuroscience (miscellaneous), system, Machine learning, lcsh:RC321-571, 03 medical and health sciences, Cellular and Molecular Neuroscience, Developmental Neuroscience, medicine, lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry, 030304 developmental biology, resting brain, business.industry, Motor control, Experimental data, Spinal cord, proprioceptors, Continuous integration, Embodied cognition, network, large-scale model, Artificial intelligence, business, computer, 030217 neurology & neurosurgery, Neuroscience
Abstract: Being able to replicate real experiments with computational simulations is a unique opportunity to refine and validate models with experimental data and redesign the experiments based on simulations. However, since it is technically demanding to model all components of an experiment, traditional approaches to modeling reduce the experimental setups as much as possible. In this study, our goal is to replicate all the relevant features of an experiment on motor control and motor rehabilitation after stroke. To this aim, we propose an approach that allows continuous integration of new experimental data into a computational modeling framework. First, results show that we could reproduce experimental object displacement with high accuracy via the simulated embodiment in the virtual world by feeding a spinal cord model with experimental registration of the cortical activity. Second, by using computational models of multiple granularities, our preliminary results show the possibility of simulating several features of the brain after stroke, from the local alteration in neuronal activity to long-range connectivity remodeling. Finally, strategies are proposed to merge the two pipelines. We further suggest that additional models could be integrated into the framework thanks to the versatility of the proposed approach, thus allowing many researchers to achieve continuously improved experimental design.
Published: 2020
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14. Solvent Effects on the Actinic Step of Donor-Acceptor Stenhouse Adduct Photoswitching

Author: Paolo Foggi, Mariangela Di Donato, Wybren Jan Buma, Michael M. Lerch, Wiktor Szymanski, Andrea Lapini, Adèle D. Laurent, Miroslav Medved, Laura Bussotti, Ben L. Feringa, Alessandro Iagatti, Molecular Spectroscopy (HIMS, FNWI), Synthetic Organic Chemistry, Basic and Translational Research and Imaging Methodology Development in Groningen (BRIDGE), Centre for Medical Radiation Physics, University of Wollongong [Australia], European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Chimie Et Interdisciplinarité : Synthèse, Analyse, Modélisation (CEISAM), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Matej Bel University (UMB), Van't Hoff Institute for Molecular Sciences, University of Amsterdam [Amsterdam] (UvA), Dipartimento di Chimica [Perugia], and Università degli Studi di Perugia (UNIPG)
Subjects: spectroscopy, MOLECULAR SWITCHES, Kinetics, solvent effects, Photochemistry, 010402 general chemistry, SHEDDING LIGHT, 01 natural sciences, Catalysis, Adduct, DESIGN, TARGETS, PHOTOPHARMACOLOGY, donor-acceptor Stenhouse adducts, Spectroscopy, ComputingMilieux_MISCELLANEOUS, visible light, Molecular switch, Chemistry, donor–acceptor Stenhouse adducts, photoswitches, Chemistry (all), 010405 organic chemistry, Communication, Solvatochromism, General Chemistry, General Medicine, Communications, 0104 chemical sciences, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, Solvent, Solvent effects, VISIBLE-LIGHT, Visible spectrum
Abstract: Donor–acceptor Stenhouse adducts (DASAs) are negative photochromes that switch with visible light and are highly promising for applications ranging from smart materials to biological systems. However, the strong solvent dependence of the photoswitching kinetics limits their application. The nature of the photoswitching mechanism in different solvents is key for addressing the solvatochromism of DASAs, but as yet has remained elusive. Here, we employ spectroscopic analyses and TD‐DFT calculations to reveal changing solvatochromic shifts and energies of the species involved in DASA photoswitching. Time‐resolved visible pump‐probe spectroscopy suggests that the primary photochemical step remains the same, irrespective of the polarity and protic nature of the solvent. Disentangling the different factors determining the solvent‐dependence of DASA photoswitching, presented here, is crucial for the rational development of applications in a wide range of different media.
Published: 2018
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15. Precision spectroscopy of Helium

Author: Inguscio, M [European Laboratory for Non-Linear Spectroscopy - LENS, Via N. Carrara 1, 50019 Sesto Fiorentino (Italy) and Dipartimento di Fisica-Universita di Firenze Via N. Carrara 1, 50019 Sesto Fiorentino (Italy)]
Published: 2005
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16. Tailoring Photoisomerization Pathways in Donor-Acceptor Stenhouse Adducts: The Role of the Hydroxy Group

Author: Paolo Foggi, Michael M. Lerch, Ben L. Feringa, Andrea Lapini, Wiktor Szymanski, Mariangela Di Donato, Wybren Jan Buma, Laura Bussotti, Adèle D. Laurent, Miroslav Medved, Alessandro Iagatti, Molecular Spectroscopy (HIMS, FNWI), Centre for Medical Radiation Physics, University of Wollongong [Australia], European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Chimie Et Interdisciplinarité : Synthèse, Analyse, Modélisation (CEISAM), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Van't Hoff Institute for Molecular Sciences, University of Amsterdam [Amsterdam] (UvA), Dipartimento di Chimica [Perugia], Università degli Studi di Perugia (UNIPG), Synthetic Organic Chemistry, and Basic and Translational Research and Imaging Methodology Development in Groningen (BRIDGE)
Subjects: CYANINE DYES, MECHANISM, Photoisomerization, PIANCATELLI REARRANGEMENT, Phot, 010402 general chemistry, Photochemistry, 01 natural sciences, Adduct, PROBES, DENSITY-FUNCTIONAL THEORY, chemistry.chemical_compound, CHEMISTRY, PHOTOPHARMACOLOGY, Physical and Theoretical Chemistry, Cyanine, ComputingMilieux_MISCELLANEOUS, EXCITED-STATES, VISIBLE-LIGHT, PHOTOSWITCH, Photoswitch, 010405 organic chemistry, Polyene, Fluorescence, 0104 chemical sciences, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, chemistry, Proton NMR
Abstract: Donor–acceptor Stenhouse adducts (DASAs) are a rapidly emerging class of visible light-activatable negative photochromes. They are closely related to (mero)cyanine dyes with the sole difference being a hydroxy group in the polyene chain. The presence or absence of the hydroxy group has far-reaching consequences for the photochemistry of the compound: cyanine dyes are widely used as fluorescent probes, whereas DASAs hold great promise for visible light-triggered photoswitching. Here we analyze the photophysical properties of a DASA lacking the hydroxy group. Ultrafast time-resolved pump–probe spectroscopy in both the visible and IR region show the occurrence of E–Z photoisomerization on a 20 ps time scale, similar to the photochemical behavior of DASAs, but on a slower time scale. In contrast to the parent DASA compounds, where the initial photoisomerization is constrained to a single position (next to the hydroxy group), 1H NMR in situ-irradiation studies at 213 K reveal that for nonhydroxy DASAs E–Z photoisomerization can take place at two different bonds, yielding two distinct isomers. These observations are supported by TD-DFT calculations, showing that in the excited state the hydroxy group (pre)selects the neighboring C2–C3 bond for isomerization. The TD-DFT analysis also explains the larger solvatochromic shift observed for the parent DASAs as compared to the nonhydroxy analogue, in terms of the dipole moment changes evoked upon excitation. Furthermore, computations provide helpful insights into the photoswitching energetics, indicating that without the hydroxy group the 4π-electrocyclization step is energetically forbidden. Our results establish the central role of the hydroxy group for DASA photoswitching and suggest that its introduction allows for tailoring photoisomerization pathways, presumably both through (steric) fixation via a hydrogen bond with the adjacent carbonyl group of the acceptor moiety, as well as through electronic effects on the polyene backbone. These insights are essential for the rational design of novel, improved DASA photoswitches and for a better understanding of the properties of both DASAs and cyanine dyes.
Published: 2018
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17. Shedding Light on the Photoisomerization Pathway of Donor-Acceptor Stenhouse Adducts

Author: Michael M. Lerch, Wiktor Szymanski, Alessandro Iagatti, Mariangela Di Donato, Paolo Foggi, Denis Jacquemin, Laura Bussotti, Ben L. Feringa, Andrea Lapini, Miroslav Medved, Svante P. Ihrig, Wybren Jan Buma, Adèle D. Laurent, Molecular Spectroscopy (HIMS, FNWI), European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Centre for Medical Radiation Physics, University of Wollongong [Australia], Chimie Et Interdisciplinarité : Synthèse, Analyse, Modélisation (CEISAM), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Université de Nantes (UN), Van't Hoff Institute for Molecular Sciences, University of Amsterdam [Amsterdam] (UvA), Dipartimento di Chimica [Perugia], Università degli Studi di Perugia (UNIPG), Synthetic Organic Chemistry, and Basic and Translational Research and Imaging Methodology Development in Groningen (BRIDGE)
Subjects: MOLECULAR SWITCHES, Photoisomerization, Kinetics, Infrared spectroscopy, PHOTOSWITCHES, 010402 general chemistry, Photochemistry, 01 natural sciences, Biochemistry, Catalysis, Adduct, INFRARED-SPECTROSCOPY, Colloid and Surface Chemistry, SPECTRA, PHOTOPHARMACOLOGY, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), ComputingMilieux_MISCELLANEOUS, Molecular switch, ISOMERIZATION, IR pump-probe spectroscopy, 010405 organic chemistry, Chemistry, Communication, General Chemistry, 0104 chemical sciences, RESPONSIVE POLYMER, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, VISIBLE-LIGHT, SYSTEM, Excited state, ComputingMethodologies_DOCUMENTANDTEXTPROCESSING, Isomerization, Visible spectrum
Abstract: Donor-acceptor Stenhouse adducts (DASAs) are negative photochromes that hold great promise for a variety of applications. Key to optimizing their switching properties is a detailed understanding of the photoswitching mechanism, which, as yet, is absent. Here we characterize the actinic step of DASA-photoswitching and its key intermediate, which was studied using a combination of ultrafast visible and IR pump-probe spectroscopies and TD-DFT calculations. Comparison of the time-resolved IR spectra with DFT computations allowed to unambiguously identify the structure of the intermediate, confirming that light absorption induces a sequential reaction path in which a Z-E photoisomerization of C2-C3 is followed by a rotation around C3-C4 and a subsequent thermal cyclization step. First and second-generation DASAs share a common photoisomerization mechanism in chlorinated solvents with notable differences in kinetics and lifetimes of the excited states. The photogenerated intermediate of the second-generation DASA was photo-accumulated at low temperature and probed with time-resolved spectroscopy, demonstrating the photoreversibility of the isomerization process. Taken together, these results provide a detailed picture of the DASA isomerization pathway on a molecular level.
Published: 2017
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18. Non-Lorentzian local density of states in coupled photonic crystal cavities probed by near- and far-field emission

Author: Dario Balestri, Tong Wu, Nicoletta Granchi, Francesco Pagliano, Daniele Pellegrino, Philippe Lalanne, Andrei Yu. Silov, Kevin Vynck, Frank W. Otten, Massimo Gurioli, Andrea Fiore, Francesca Intonti, Matteo Ciardi, Eindhoven University of Technology [Eindhoven] (TU/e), European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Laboratoire Photonique, Numérique et Nanosciences (LP2N), Université de Bordeaux (UB)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS), LP2N_A2, LP2N_G6, ANR-18-CE24-0026,NOMOS,Meta-optique non linéaire(2018), ANR-18-CE47-0006,I-SQUAD,Boîte et molécule quantiques semi-conductrices localisées pour l'optique quantique intégrée(2018), European Project: 828890,NARCISO, Università degli Studi di Firenze = University of Florence (UniFI), Semiconductor Nanophotonics, Photonics and Semiconductor Nanophysics, Semiconductor Nanostructures and Impurities, Physics of Semiconductor Nanostructures, Eindhoven Hendrik Casimir institute, and Center for Quantum Materials and Technology Eindhoven
Subjects: Physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Photoluminescence, Local density of states, Resolution (electron density), Physics::Optics, General Physics and Astronomy, Near and far field, 01 natural sciences, Computational physics, Quality (physics), Quantum dot, 0103 physical sciences, 010306 general physics, ComputingMilieux_MISCELLANEOUS, Line (formation), Photonic crystal
Abstract: Recent theories proposed a deep revision of the well-known expression for the Purcell factor, with counterintuitive effects, such as complex modal volumes and non-Lorentzian local density of states. We experimentally demonstrate these predictions in tailored coupled cavities on photonic crystal slabs with relatively low optical losses. Near-field hyperspectral imaging of quantum dot photoluminescence is proved to be a direct tool for measuring the line shape of the local density of states. The experimental results clearly evidence non-Lorentzian character, in perfect agreement with numerical and theoretical predictions. Spatial maps with deep subwavelength resolution of the real and imaginary parts of the complex mode volumes are presented. The generality of these results is confirmed by an additional set of far-field and time-resolved experiments in cavities with larger modal volume and higher quality factors.
Published: 2020
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19. Testing gravity with cold atom interferometry: Results and prospects

Author: Guglielmo M. Tino, European Laboratory for Non-Linear Spectroscopy (LENS), and Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI)
Subjects: Atom interferometer, Gravity (chemistry), Physics and Astronomy (miscellaneous), General relativity, Atomic Physics (physics.atom-ph), Materials Science (miscellaneous), FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Gravitational acceleration, 01 natural sciences, General Relativity and Quantum Cosmology, Physics - Atomic Physics, Gravitation, Theoretical physics, High Energy Physics::Theory, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Electrical and Electronic Engineering, 010306 general physics, ComputingMilieux_MISCELLANEOUS, Physics, Quantum Physics, 010308 nuclear & particles physics, Gravitational wave, Atomic and Molecular Physics, and Optics, atom interferometry, experimental tests of gravity, new physics, cold atoms, atomic clocks, Dark energy, Quantum gravity, Quantum Physics (quant-ph)
Abstract: Atom interferometers have been developed in the last three decades as new powerful tools to investigate gravity. They were used for measuring the gravity acceleration, the gravity gradient, and the gravity-field curvature, for the determination of the gravitational constant, for the investigation of gravity at microscopic distances, to test the equivalence principle of general relativity and the theories of modified gravity, to probe the interplay between gravitational and quantum physics and to test quantum gravity models, to search for dark matter and dark energy, and they were proposed as new detectors for the observation of gravitational waves. Here I describe past and ongoing experiments with an outlook on what I think are the main prospects in this field and the potential to search for new physics.
Published: 2020
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20. Metrological Detection of Multipartite Entanglement from Young Diagrams

Author: Manuel Gessner, Zhihong Ren, Wei-Dong Li, Augusto Smerzi, Shanxi University, Laboratoire Kastler Brossel (LKB (Jussieu)), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), European Laboratory for Non-Linear Spectroscopy (LENS), and Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI)
Subjects: Quantum Physics, Rank (linear algebra), Quantum sensing, Diagram, Quantum sensor, General Physics and Astronomy, FOS: Physical sciences, Quantum correlations in quantum information, Quantum entanglement, Quantum metrology, Metrology, 01 natural sciences, Multipartite entanglement, Range (mathematics), [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], 0103 physical sciences, Entanglement detection, Statistical physics, 010306 general physics, Quantum Physics (quant-ph), Mathematics
Abstract: We characterize metrologically useful multipartite entanglement by representing partitions with Young diagrams. We derive entanglement witnesses that are sensitive to the shape of Young diagrams and show that Dyson's rank acts as a resource for quantum metrology. Common quantifiers, such as the entanglement depth and $k$-separability are contained in this approach as the diagram's width and height. Our methods are experimentally accessible in a wide range of atomic systems, as we illustrate by analyzing published data on the quantum Fisher information and spin-squeezing coefficients., Comment: 6 + 7 pages, 5 + 8 figures
Published: 2020
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21. Red Thermally Activated Delayed Fluorescence and the Intersystem Crossing Mechanisms in Compact Naphthalimide–Phenothiazine Electron Donor/Acceptor Dyads

Author: Geliang Tang, Daniel Escudero, Wenbo Yang, Jianzhang Zhao, Qingyun Liu, A. A. Sukhanov, Violeta K. Voronkova, Zhijia Wang, Denis Jacquemin, Mariangela Di Donato, Fudan University [Shanghai], European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Chimie Et Interdisciplinarité : Synthèse, Analyse, Modélisation (CEISAM), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), and Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)
Subjects: Technology, PI-A, Luminescence, ANNIHILATION UP-CONVERSION, TRIPLET EXCITED-STATE, Materials Science, Electron donor, Materials Science, Multidisciplinary, 02 engineering and technology, spin dynamics, 010402 general chemistry, Photochemistry, DONOR, 01 natural sciences, Quantum mechanics, Fluorescence, Absorption, chemistry.chemical_compound, Phenothiazine, Physical and Theoretical Chemistry, Nanoscience & Nanotechnology, PARAMAGNETIC-RES, Science & Technology, SINGLET OXYGEN, [PHYS.PHYS]Physics [physics]/Physics [physics], Chemistry, Physical, INTRAMOLECULAR CHARGE-TRANSFER, charge transfer, 021001 nanoscience & nanotechnology, Acceptor, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Coupling (electronics), Chemistry, General Energy, Intersystem crossing, chemistry, time resolved spectroscopy, Physical Sciences, Solvents, Science & Technology - Other Topics, METAL-COMPLEXES, 0210 nano-technology, ENERGY-TRANSFER, TIME-RESOLVED EPR
Abstract: International audience; Controlling the electronic coupling between electron donor and acceptor subunits in a dyad is pivotal for the development of novel organic materials, for instance, thermally activated delayed fluorescence (TADF) materials and triplet photosensitizers. Herein, we prepared two compact electron donor/acceptor dyads based on phenothiazine (PTZ) and naphthalimide (NI) with different conformation restrictions induced by the C–N (NI-N-PTZ) or C–C (NI-C-PTZ) linkers. The effect of electronic coupling (matrix elements, VDA) on the photophysical properties, especially the intersystem crossing (ISC) and the TADF, were investigated. NI-C-PTZ shows stronger ground-state electronic coupling (VDA = 2548 cm–1) compared to NI-N-PTZ (VDA = 870 cm–1). TADF was observed only for NI-N-PTZ due to its smaller electronic coupling. Time-resolved electron paramagnetic resonance (TREPR) spectroscopy indicated the presence two triplet excited states and three ISC mechanisms in NI-N-PTZ with different electron spin polarizations (ESP): radical pair ISC (RP-ISC) and spin–orbital charge transfer ISC (SOCT-ISC) for one triplet state, and spin–orbital coupling ISC (SO-ISC) for another. Moreover, for the second one, an inversion of the electron spin polarization (ESP) was observed at 0.5–1.1 μs delay time. NI-N-PTZ represents a rare example for compact electron donor/acceptor dyad showing TADF emission in the red spectral region.
Published: 2019
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22. Exploring the Foundations of the Universe with Space Tests of the Equivalence Principle

Author: Gilles Métris, Serge Reynaud, Luc Blanchet, Philippe Jetzer, Manuel Rodrigues, Baptiste Battelier, Carlos F. Sopuerta, Pierre Fayet, Miquel Nofrarías, Steve Lecomte, Peter Wolf, Andrea Bertoldi, Christine Guerlin, Christian Schubert, Claus Braxmaier, T. J. Sumner, Wolfgang P. Schleich, Sina Loriani, Claus Lämmerzahl, Kai Bongs, Martin Zelan, Ernst M. Rasel, Aurélien Hees, Philip Tuckey, Philippe Bouyer, Christophe Le Poncin-Lafitte, Wolf von Klitzing, Lisa Wörner, Guglielmo M. Tino, Markus Rothacher, Naceur Gaaloul, Stephan Schiller, Christophe Salomon, Fiodor Sorrentino, Joel Bergé, Albert Roura, Davide Calonico, Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Photonique, Numérique et Nanosciences (LP2N), Université de Bordeaux (UB)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Théorique de l'ENS (LPTENS), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Kastler Brossel (LKB [Collège de France]), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Collège de France (CdF (institution)), Systèmes de Référence Temps Espace (SYRTE), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Observatoire de la Côte d'Azur (OCA), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), ONERA - The French Aerospace Lab [Toulouse], ONERA, DPHY, ONERA, Université Paris Saclay [Châtillon], ONERA-Université Paris-Saclay, School of Physics and Astronomy [Birmingham], University of Birmingham [Birmingham], Deutsches Zentrum für Luft- und Raumfahrt (DLR), Center of Applied Space Technology and Microgravity (ZARM), Universität Bremen, Istituto Nazionale di Ricerca Metrologica (INRiM), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre for Quantum Engineering and Space-time Research (QUEST), Leibniz Universität Hannover [Hannover] (LUH), Laboratoire Kastler Brossel (LKB (Jussieu)), Laboratoire national de métrologie et d'essais - Systèmes de Référence Temps-Espace (LNE - SYRTE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Physik-Institut [Zürich], Universität Zürich [Zürich] (UZH), Centre Suisse d'Electronique et Microtechnique SA (CSEM), Institute of Space Sciences [Barcelona] (ICE-CSIC), Spanish National Research Council [Madrid] (CSIC), Institute for Space Studies of Catalonia [Barcelona] (IEEC-CSIC), Institute of Geodesy and Photogrammetry [Zürich] (IGP), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), German Aerospace Center (DLR), Institut fur Experimentalphysik, Heinrich Heine Universität Düsseldorf = Heinrich Heine University [Düsseldorf], Istituto Nazionale di Fisica Nucleare, Sezione di Genova (INFN, Sezione di Genova), Istituto Nazionale di Fisica Nucleare (INFN), Imperial College London, European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Istituto Nazionale di Fisica Nucleare, Sezione di Firenze (INFN, Sezione di Firenze), Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), RISE Research Institutes of Sweden, Open Access funding enabled and organized by Projekt DEAL, Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris)-Collège de France (CdF)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), PSL Research University (PSL)-PSL Research University (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Théorique de l'ENS [École Normale Supérieure] (LPTENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Leibniz Universität Hannover=Leibniz University Hannover, Universität Zürich [Zürich] = University of Zurich (UZH), Géoazur (GEOAZUR 7329), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Università degli Studi di Firenze = University of Florence (UniFI), and Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université de Bordeaux (UB)
Subjects: Computer science, Quantum technologies, FOS: Physical sciences, Context (language use), Space (commercial competition), Electrostatic accelerometers, 01 natural sciences, Gravitation, White paper, Physics - Space Physics, Physical universe, Equivalence principle, 0103 physical sciences, Calculus, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Instrumentation and Methods for Astrophysics (astro-ph.IM), [PHYS]Physics [physics], Space Tests, 010308 nuclear & particles physics, Universality (philosophy), Astronomy and Astrophysics, 16. Peace & justice, Space Physics (physics.space-ph), Dewey Decimal Classification::500 | Naturwissenschaften::520 | Astronomie, Kartographie, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Quantum technology, Atom Interferometry, Space and Planetary Science, Satellite, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], ddc:520, Astrophysics - Instrumentation and Methods for Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract: Battelier, B., et al., We present the scientific motivation for future space tests of the equivalence principle, and in particular the universality of free fall, at the 10 level or better. Two possible mission scenarios, one based on quantum technologies, the other on electrostatic accelerometers, that could reach that goal are briefly discussed. This publication is a White Paper written in the context of the Voyage 2050 ESA Call for White Papers., Open Access funding enabled and organized by Projekt DEAL.
Published: 2019
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23. Iminothioindoxyl as a molecular photoswitch with 100 nm band separation in the visible range

Author: Michiel Hilbers, Ben L. Feringa, Mark W. H. Hoorens, Wybren Jan Buma, Wiktor Szymanski, Adèle D. Laurent, Miroslav Medved, Mariangela Di Donato, Samuele Fanetti, Laura Slappendel, Chimie Et Interdisciplinarité : Synthèse, Analyse, Modélisation (CEISAM), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Synthetic Organic Chemistry, Basic and Translational Research and Imaging Methodology Development in Groningen (BRIDGE), and Molecular Spectroscopy (HIMS, FNWI)
Subjects: 0301 basic medicine, Materials science, Chemical physics, Science, General Physics and Astronomy, Infrared spectroscopy, PROTEIN, Synthetic chemistry methodology, 02 engineering and technology, Article, General Biochemistry, Genetics and Molecular Biology, AZOBENZENE PHOTOSWITCHES, photoswitch, isomerization, azobenzene photoswitches, infrared-spectroscopy, excited-states, light, photocontrol, derivatives, peptides, protein, design, INFRARED-SPECTROSCOPY, 03 medical and health sciences, DESIGN, lcsh:Science, ComputingMilieux_MISCELLANEOUS, FELIX Condensed Matter Physics, Millisecond, Multidisciplinary, Photoswitch, business.industry, Molecular and Biophysics, DERIVATIVES, PEPTIDES, General Chemistry, 021001 nanoscience & nanotechnology, Light harvesting, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, 030104 developmental biology, LIGHT, PHOTOCONTROL, EXCITED-STATES, Picosecond, Visible range, Optoelectronics, lcsh:Q, 0210 nano-technology, business, Visible spectrum
Abstract: Light is an exceptional external stimulus for establishing precise control over the properties and functions of chemical and biological systems, which is enabled through the use of molecular photoswitches. Ideal photoswitches are operated with visible light only, show large separation of absorption bands and are functional in various solvents including water, posing an unmet challenge. Here we show a class of fully-visible-light-operated molecular photoswitches, Iminothioindoxyls (ITIs) that meet these requirements. ITIs show a band separation of over 100 nm, isomerize on picosecond time scale and thermally relax on millisecond time scale. Using a combination of advanced spectroscopic and computational techniques, we provide the rationale for the switching behavior of ITIs and the influence of structural modifications and environment, including aqueous solution, on their photochemical properties. This research paves the way for the development of improved photo-controlled systems for a wide variety of applications that require fast responsive functions., The design of photoswitches which operate in the visible light regime, show a large separation of absorption bands and are functional in various solvents is challenging. Here the authors report Iminothioindoxyls as visible-light operated photoswitches with a band separation of 100 nm.
Published: 2019
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24. Short- and Long-Range Solvation Effects on the Transient UV–Vis Absorption Spectra of a Ru(II)–Polypyridine Complex Disentangled by Nonequilibrium Molecular Dynamics

Author: Javier Cerezo, Paolo Foggi, Giacomo Prampolini, Mariachiara Pastore, Alessandro Iagatti, Francesca Ingrosso, Consiglio Nazionale delle Ricerche - Istituto di Chimica dei Composti Organometallici (CNR-ICCOM), Laboratoire de Physique et Chimie Théoriques (LPCT), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Departemento de Quimica - Universidad Autónoma de Madrid, Universidad Autonoma de Madrid (UAM), European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze], Istituto Nazionale di Ottica (INO), Consiglio Nazionale delle Ricerche (CNR), Dipartimento di Chimica [Perugia], Università degli Studi di Perugia (UNIPG), Istituto di Chimica dei Composti Organometallici (ICCOM), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), and Istituto Nazionale di Ottica [Firenze] (INO-CNR)
Subjects: Polypyridine complex, Materials science, Absorption spectroscopy, 02 engineering and technology, 01 natural sciences, Spectral line, chemistry.chemical_compound, nonequilibrium dynamics, 0103 physical sciences, General Materials Science, Physical and Theoretical Chemistry, ComputingMilieux_MISCELLANEOUS, 010304 chemical physics, Hydrogen bond, Solvation, force-fields, 021001 nanoscience & nanotechnology, Solvent, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, chemistry, Chemical physics, Excited state, transient spectroscopy, solvation, 0210 nano-technology, Protic solvent
Abstract: Evidence of subtle effects in the dynamic reorganization of a protic solvent in its first- and farther-neighbor shells, in response to the sudden change in the solute's electronic distribution upon excitation, is unveiled by a multilevel computational approach. Through the combination of nonequilibrium molecular dynamics and quantum mechanical calculations, the experimental time evolution of the transient T1 absorption spectra of a heteroleptic Ru(II)-polypyridine complex in ethanol or dimethyl sulfoxide solution is reproduced and rationalized in terms of both fast and slow solvent re-equilibration processes, which are found responsible for the red shift and broadening experimentally observed only in the protic medium. Solvent orientational correlation functions and a time-dependent analysis of the solvation structure confirm that the initial, fast observed red shift can be traced back to the destruction-formation of hydrogen bond networks in the first-neighbor shell, whereas the subsequent shift, evident in the [20-500] ps range and accompanied by a large broadening of the signal, is connected to a collective reorientation of the second and farther solvation shells, which significantly changes the electrostatic embedding felt by the excited solute.
Published: 2019
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25. Dense, Subnano Phase of Clustered O 2

Author: Kamil Dziubek, Jérôme Rouquette, Francesco Di Renzo, Julien Haines, Michael Hanfland, Roberto Bini, Mario Santoro, Marta Morana, Federico A. Gorelli, Demetrio Scelta, Istituto Nazionale di Ottica (INO), Consiglio Nazionale delle Ricerche (CNR), European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Istituto di Chimica dei Composti Organometallici (ICCOM), European Laboratory for Nonlinear Spectroscopy, LENS - European Laboratory for Non-Linear Spectroscopy, UniVersita ́ di Firenze, UniVersita ? di Firenze, European Synchrotron Radiation Facility (ESRF), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), and Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)
Subjects: Diffraction, Materials science, Infrared, chemistry.chemical_element, 02 engineering and technology, 01 natural sciences, Oxygen, Diamond anvil cell, symbols.namesake, Phase (matter), 0103 physical sciences, [CHIM]Chemical Sciences, Physical and Theoretical Chemistry, 010306 general physics, Solid oxygen, 021001 nanoscience & nanotechnology, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, General Energy, Chemical bond, chemistry, Chemical physics, symbols, long-range order, oxygen, diamond anvil cells, X-ray diffraction and infrared and Raman spectroscopy, 0210 nano-technology, Raman spectroscopy
Abstract: International audience; Condensed O2 tends to form clusters, even with a long-range order. In particular, in solid oxygen, strong intermolecular charge transfer at high pressures leads to the formation of (O2)4 tetramers above 10 GPa, in the ε-O2 phase, with weak O2–O2 chemical bonds. Indeed, ε-O2 is entirely made of these tetramers. We conducted experimental investigations on strongly densified O2 in a different environment, that is to say in the form of a subnano phase build up within the 1D microchannels of a purely siliceous, inert zeolite, TON, at pressures of 0.5–20 GPa, by means of diamond anvil cells. Our X-ray diffraction and infrared and Raman spectroscopy results consistently show that oxygen forms clusters in this nanophase, above 10 GPa, similar to ε-O2, except that the clusters are rather of the type of weakly bonded (O2)2 dimers in this case. Also, by analogy with bulk oxygen, we show that the O2 spin within the dimers departs from S = 1 toward lower values, upon increasing pressure. Our findings thereby add to the general view on essential properties of highly dense oxygen.
Published: 2019
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26. Controlling the self-assembly behavior of aqueous chitin nanocrystal suspensions

Author: Bruno Frka-Petesic, Aurimas Narkevicius, Richard M. Parker, Yu Ogawa, Silvia Vignolini, Lisa Maria Steiner, Centre de Recherches sur les Macromolécules Végétales (CERMAV ), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Physicochimie des Electrolytes, Colloïdes et Sciences Analytiques (PECSA), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC), European Laboratory for Non-linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Narkevicius, Aurimas [0000-0003-0787-6489], Steiner, Lisa [0000-0002-6868-0423], Parker, Richard [0000-0002-4096-9161], Frka-Petesic, Bruno [0000-0001-5002-5685], Vignolini, Silvia [0000-0003-0664-1418], and Apollo - University of Cambridge Repository
Subjects: Materials science, Polymers and Plastics, Bioengineering, Chitin, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Biomaterials, Colloid, chemistry.chemical_compound, Suspensions, Liquid crystal, Materials Chemistry, [CHIM]Chemical Sciences, Cellulose, ComputingMilieux_MISCELLANEOUS, Aqueous solution, Liquid crystalline, Hydrolysis, Osmolar Concentration, Water, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Chemical engineering, Nanocrystal, Nanoparticles, 0210 nano-technology
Abstract: As with many other biosourced colloids, chitin nanocrystals (ChNCs) can form liquid crystalline phases with chiral nematic ordering. In this work, we demonstrate that it is possible to finely tune the liquid crystalline behavior of aqueous ChNC suspensions finely. Such control was made possible by carefully studying how the hydrolysis conditions and suspension treatments affect the colloidal and self-assembly properties of ChNCs. Specifically, we systematically investigated the effects of duration and acidity of chitin hydrolysis required to extract ChNCs, as well as the effects of the tip sonication energy input, degree of acetylation, pH and ionic strength. Finally, we show that by controlled water evaporation, it is possible to retain and control the helicoidal ordering in dry films, leading to a hierarchical architecture analogous to that found in nature, e.g. in crab shells. We believe that this work serves as a comprehensive insight into ChNC preparation and handling which is required to unlock the full potential of this material in both a scientific and industrial context. © 2019 American Chemical Society.
Published: 2019
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27. Mapping complex mode volumes with cavity perturbation theory

Author: Dario Balestri, Kévin G. Cognée, Wei Yan, Francesca Intonti, A. F. Koenderink, Massimo Gurioli, F. La China, Philippe Lalanne, Laboratoire Photonique, Numérique et Nanosciences (LP2N), Université de Bordeaux (UB)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS), FOM Institute for Atomic and Molecular Physics (AMOLF), European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), LP2N_A2, LP2N_G6, and Quantum Gases & Quantum Information (WZI, IoP, FNWI)
Subjects: Physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Imaginary part, Perturbation (astronomy), FOS: Physical sciences, Observable, 02 engineering and technology, Purcell effect, 021001 nanoscience & nanotechnology, 01 natural sciences, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, photonic crystals, near field, open systems, Classical mechanics, Electric field, 0103 physical sciences, Spontaneous emission, Near-field scanning optical microscope, Cavity perturbation theory, 010306 general physics, 0210 nano-technology, ComputingMilieux_MISCELLANEOUS, Optics (physics.optics), Physics - Optics
Abstract: Microcavities and nanoresonators are characterized by their quality factors (Q) and mode volumes (V). While Q is unambiguously defined, there are still questions on V and, in particular, on its complex-valued character, whose imaginary part is linked to the non-Hermitian nature of open systems. Helped by cavity perturbation theory and near-field experimental data, we clarify the physics captured by the imaginary part of V and show how a mapping of the spatial distribution of both the real and imaginary parts can be directly inferred from perturbation measurements. This result shows that the mathematically abstract complex mode V, in fact, is directly observable.
Published: 2019
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28. Crystalline polymeric carbon dioxide stable at megabar pressures

Author: Mohamed Mezouar, Roberto Bini, Gaston Garbarino, Martin Ende, Ronald Miletich, Demetrio Scelta, Kamil Dziubek, European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Institut für Mineralogie und Kristallographie, Universität Wien, and European Synchrotron Radiation Facility (ESRF)
Subjects: 0301 basic medicine, Hydrogen, Annealing (metallurgy), General Physics and Astronomy, 01 natural sciences, 7. Clean energy, OXYGEN, Dissociation (chemistry), chemistry.chemical_compound, lcsh:Science, TEMPERATURE, Phase diagram, [PHYS]Physics [physics], Multidisciplinary, HYDROGEN, diamond anvil cell, laser heating, syncrotron, Earth's interior, carbon dioxide, high pressure spectroscopy, PHASE V, Chemical physics, Carbon dioxide, symbols, CO2, Materials science, TRANSFORMATIONS, Science, chemistry.chemical_element, engineering.material, Article, General Biochemistry, Genetics and Molecular Biology, 03 medical and health sciences, symbols.namesake, MAGNESITE, 0103 physical sciences, Structure of solids and liquids, 010306 general physics, STABILITY, Diamond, DEEP LOWER-MANTLE, General Chemistry, Amorphous solid, Geochemistry, 030104 developmental biology, chemistry, 13. Climate action, X-RAY, engineering, Materials chemistry, lcsh:Q, Raman spectroscopy
Abstract: Carbon dioxide is a widespread simple molecule in the Universe. In spite of its simplicity it has a very complex phase diagram, forming both amorphous and crystalline extended phases above 40 GPa. The stability range and nature of these phases are still debated, especially in view of their possible role within the deep carbon cycle. Here, we report static synchrotron X-ray diffraction and Raman high-pressure experiments in the megabar range providing evidence for the stability of the polymeric phase V at pressure-temperature conditions relevant to the Earth’s lowermost mantle. The equation of state has been extended to 120 GPa and, contrary to earlier experimental findings, neither dissociation into diamond and ε-oxygen nor ionization was observed. Severe deviatoric stress and lattice deformation along with preferred orientation are removed on progressive annealing, thus suggesting CO2-V as the stable structure also above one megabar., The nature and stability of carbon dioxide under extreme conditions relevant to the Earth’s mantle is still under debate, in view of its possible role within the deep carbon cycle. Here, the authors perform high-pressure experiments providing evidence that polymeric crystalline CO2 is stable under megabaric conditions.
Published: 2018
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29. Tracing the stellar component of low surface brightness Milky Way dwarf galaxies to their outskirts

Author: Anthony R. Conn, Geraint F. Lewis, J. R. Bermejo-Climent, Nuwanthika Fernando, Magda Guglielmo, T. J. L. de Boer, B. McMonigal, Giuseppina Battaglia, Alan W. McConnachie, L. Cicuendez, Eline Tolstoy, Carme Gallart, Nicholas F. Bate, Rodrigo A. Ibata, Mike Irwin, Instituto de Astrofisica de Canarias (IAC), Universidad de La Laguna [Tenerife - SP] (ULL), Institute of Astronomy [Cambridge], University of Cambridge [UK] (CAM), Istituto di Astrofisica Spaziale e Fisica cosmica - Bologna (IASF-Bo), Istituto Nazionale di Astrofisica (INAF), The University of Sydney, Istituto Nazionale di Fisica Nucleare, Sezione di Firenze (INFN, Sezione di Firenze), Istituto Nazionale di Fisica Nucleare (INFN), European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Observatoire astronomique de Strasbourg (ObAS), Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), NRC Herzberg Institute of Astrophysics, National Research Council of Canada (NRC), Kapteyn Astronomical Institute [Groningen], University of Groningen [Groningen], Irwin, Mike [0000-0002-2191-9038], Apollo - University of Cambridge Repository, and Astronomy
Subjects: Stellar population, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Metallicity, Milky Way, MATCHED-FILTER, FOS: Physical sciences, CHEMICAL EVOLUTION, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, CARINA DWARF, Blue straggler, dark matter, BLUE STRAGGLER STARS, RADIAL GRADIENTS, GLOBULAR-CLUSTERS, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, galaxies: individual: Sextans dSph, galaxies: statistics, Dwarf galaxy, Physics, 010308 nuclear & particles physics, Astronomy and Astrophysics, galaxies: dwarf, Horizontal branch, STAR-FORMATION HISTORY, Astrophysics - Astrophysics of Galaxies, Dwarf spheroidal galaxy, SPHEROIDAL GALAXY, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Globular cluster, Local Group, BAYES FACTORS, galaxies: structure
Abstract: We present results from deep and very spatially extended CTIO/DECam $g$ and $r$ photometry (reaching out to $\sim$ 2 mag below the oldest MSTO and covering $\sim$ 20 deg$^2$) around the Sextans dSph. We use this data-set to study the structural properties of Sextans overall stellar population and its different stellar evolutionary phases, as well as to search for signs of tidal disturbance from the MW, which would indicate departure from dynamical equilibrium. We perform the most accurate structural analysis to-date of Sextans' stellar components by applying Bayesian MCMC methods to the individual stars' positions. Surface density maps are built by decontaminating the sample through a matched filter analysis of the CMD, and then analysed for departures from axisymmetry. Sextans is found to be considerably less spatially extended than early studies suggested. No significant distortions or tidal disturbances are found down to a surface brightness of $\sim$ 31.8 mag/arcsec$^{-2}$ in V-band. We identify an overdensity in the central regions that may correspond to previously reported kinematic substructure(s). In agreement with previous findings, old $\&$ metal-poor stars such as BHB stars cover a much larger area than stars in other evolutionary phases, and bright BSs are less spatially extended than faint ones. However, the different spatial distribution of bright and faint BSs appears consistent with the general age/metallicity gradients found in Sextans' stellar component. This is compatible with BSs having formed by evolution of binaries and not necessarily due to the presence of a central disrupted globular cluster, as suggested in the literature. We provide structural parameters for the various populations analyzed and make publicly available the photometric catalogue of point-sources as well as a catalogue of literature spectroscopic measurements with updated membership probabilities., 21 pages, 14 figures, 9 tables, accepted for publication in Astronomy & Astrophysics (A&A), the associated photometric and spectroscopic catalogues will be available at CDS, abstract abridged for arXiv
Published: 2018
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30. Dynamics and reactivity of water in natural montmorillonites

Author: Chloé Fourdrin, Aarrachi Hanane, Christelle Latrille, Faiza Bergaya, Jean-Philippe Renault, Manuela Lima, Sophie Le Caër, Laboratoire des Solides Irradiés (LSI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X), Laboratoire Interdisciplinaire sur l'Organisation Nanométrique et Supramoléculaire (LIONS), Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M) (NIMBE UMR 3685), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Mesures et Modélisation de la Migration des Radionucléides (L3MR), Service d'Etudes du Comportement des Radionucléides (SECR), Département de Physico-Chimie (DPC), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Département de Physico-Chimie (DPC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre de Recherche sur la Matière Divisée (CRMD), Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO), European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Palacin, Serge, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), and Università degli Studi di Firenze = University of Florence (UniFI)
Subjects: [CHIM.MATE] Chemical Sciences/Material chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry
Abstract: International audience; The radiolytic decomposition of water has significant impact in the nuclear industry. H$_2$_ radiolytically fonned by water decomposition might lead to explosion and overpressure hazards in the waste package. In the context of high level radioactive waste management, heterogeneous materials such as clay mineraIs (or concrete) are possible candidates around the waste package. For instance, bentonite, which major component is montmorillonite (Mt, the most representative swelling clay mineraI of the smectite group), is foreseen in France as backfilling material for its swelling and retention properties. However, the significant amount of water present in the interlayer space and between the particles might enhance the H$_2$ production under irradiation, and despite the environmental significance, only a few studies discuss the water radiolysis in those systems. In this context, we have decided to investigate the dynamics and the reactivity of water molecules confmed in natural montmorillonites from Camp Berteau, Marocco. Ultrafast infrared spectroscopy of the O-D stretching mode of dilute HOD in H$_2$0 probes the local environment and the hydrogen bond network of confined water [1]. The dynamics of water molecules confined in the interlayer space of montmorillonites and in interaction with two types of cations (Li$^+$ and Ca$^{2+}$) but also with the negatively charged siloxane surface was studied. The results evidenced that the OD vibrational dynamics was significantly slowed down in confined media: it went from 1.7 ps in neat water to 2.6 ps in the case of Li$^+$ cations with two water pseudolayers (2.2-2.3 ps in the case of Ca$^{2+}$ cations) and to 4.7 ps in the case of Li$^+$ cations with one water pseudo layer. No significant difference between the two cations was noticed. In this 2D confined geometry (the interlayer space being about 0.6 nm for two water pseudolayers), the relaxation time constants obtained were comparable to the ones measured in analogous concentrated salt solutions. Nevertheless, and in strong opposition to the observations perfonned in the liquid phase, anisotropy experiments evidenced the absence of rotational motions on a 5 ps time scale, proving that the hydrogen bond network in the interlayer space of the clay mineraI is locked at this time scale. Lastly, the impact of confinement on the reactivity under irradiation of confmed water molecules was investigated. The radiolysis of water confmed in natural montmorillonites was studied as a function of the composition of the montrnorillonite, the nature of the exchangeable cation, and the relative humidity by following the H$_2$ production under electron irradiation [2]. It was shown that the main factor influencing this H$_2$ production was the water amount in the interlayer space. The effect of the exchangeable cation was linked to its hydration enthalpy. When the water amount was high enough to get a basal distance higher than 1.3 nm, then a total energy transfer from the montmorillonite sheets to the interlayer space occured, and the H$_2$ production measured was very similar to the one obtained in bulk water. For a basal distance smaller than 1.3 nm, the H$_2$ production increased with the relative humidity and thus with the water amount.
Published: 2017

31. Hybrid integration of carbon nanotubes in silicon photonic resonators

Author: Duran-Valdeiglesias, Elena, Zhang, Weiwei, Alonso-Ramos, Carlos, Le Roux, Xavier, Serna, Samuel, Hoang, Thi-Hong-Cam, Balestrieri, Matteo, Marris-Morini, Delphine, Cassan, Eric, Intonti, Francesca, Sarti, Francesco, Caselli, Niccolò, China, Federico, Gurioli, Massimo, Filoramo, Arianna, Vivien, Laurent, Centre de Nanosciences et de Nanotechnologies [Orsay] (C2N), Université Paris-Sud - Paris 11 (UP11)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire Innovation en Chimie des Surfaces et NanoSciences (LICSEN UMR 3685), Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M) (NIMBE UMR 3685), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence (UniFI), European Project: 618025,EC:FP7:ICT,FP7-ICT-2013-C,CARTOON(2013), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay, Laboratoire Innovation en Chimie des Surfaces et NanoSciences (LICSEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), and Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI)
Subjects: [CHIM.MATE]Chemical Sciences/Material chemistry
Abstract: International audience; On-chip integration of all photonic components in the silicon platform is an important goal to accomplish high efficiency, low energy consumption, low cost and device miniaturization. However, silicon does not have efficient light emission or detection in the telecommunication wavelength range (close to 1.3$\mu$m and 1.55$\mu$m). Hence, hybrid integration of III-V materials or germanium is commonly adopted for the implementation of lasers and photodetectors. Nevertheless, these heterogeneous integration schemes compromise the low cost of using silicon.
Published: 2017

32. Engineering of light confinement in strongly scattering disordered media

Author: Francesco Riboli, Silvia Vignolini, Annamaria Gerardino, Kevin Vynck, Diederik S. Wiersma, Massimo Gurioli, Andrea Fiore, Niccolò Caselli, Laurent Balet, Francesca Intonti, Pierre Barthelemy, Lianhe Li, European Laboratory for Non-linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Institute of Photonics and Nanotechnology, Consiglio Nazionale delle Ricerche [Roma] (CNR), Institute of Condensed Matter Physics [Lausanne], Ecole Polytechnique Fédérale de Lausanne (EPFL), ENI S.p.A., Orthopaedic Biomechanics, Photonics and Semiconductor Nanophysics, and Semiconductor Nanophotonics
Subjects: [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Materials science, Condensed matter physics, business.industry, Scattering, Mechanical Engineering, Phase (waves), 02 engineering and technology, General Chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Photonic metamaterial, Mechanics of Materials, 0103 physical sciences, Optoelectronics, General Materials Science, Photonics, 010306 general physics, 0210 nano-technology, business, ComputingMilieux_MISCELLANEOUS, Photonic crystal
Abstract: Disordered photonic materials can diffuse and localize light through random multiple scattering, offering opportunities to study mesoscopic phenomena, control light-matter interactions, and provide new strategies for photonic applications. Light transport in such media is governed by photonic modes characterized by resonances with finite spectral width and spatial extent. Considerable steps have been made recently towards control over the transport using wavefront shaping techniques. The selective engineering of individual modes, however, has been addressed only theoretically. Here, we experimentally demonstrate the possibility to engineer the confinement and the mutual interaction of modes in a two-dimensional disordered photonic structure. The strong light confinement is achieved at the fabrication stage by an optimization of the structure, and an accurate and local tuning of the mode resonance frequencies is achieved via post-fabrication processes. To show the versatility of our technique, we selectively control the detuning between overlapping localized modes and observe both frequency crossing and anti-crossing behaviours, thereby paving the way for the creation of open transmission channels in strongly scattering media.
Published: 2014
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33. High-Pressure Phase Transition, Pore Collapse, and Amorphization in the Siliceous 1D Zeolite, TON

Author: Julien Haines, Jean-Marc Thibaud, Federico A. Gorelli, Kamil Dziubek, Francesco Di Renzo, Arie van der Lee, Jérôme Rouquette, Patrick Hermet, Gaston Garbarino, Olivier Cambon, Mario Santoro, Frederico G. Alabarse, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Laboratoire Charles Coulomb (L2C), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Adam Mickiewicz University in Poznań (UAM), Istituto Nazionale di Ottica (INO), Consiglio Nazionale delle Ricerche (CNR), European Synchrotron Radiation Facility (ESRF), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Institut Européen des membranes (IEM), and Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)
Subjects: Diffraction, Phase transition, Chemistry, Infrared spectroscopy, Thermodynamics, Primitive cell, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Spectral line, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, zeolites under pressure, Crystallography, General Energy, Phase (matter), [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], [CHIM]Chemical Sciences, Ton, Physical and Theoretical Chemistry, 0210 nano-technology, Zeolite, ComputingMilieux_MISCELLANEOUS
Abstract: The siliceous zeolite TON with a 1-D pore system was studied at high pressure by X-ray diffraction, infrared spectroscopy, and DFT calculations. The behavior of this material was investigated using nonpenetrating pressure transmitting media. Under these conditions, a phase transition from the Cmc2(1) to a Pbn2(1) structure occurs at close to 0.6 GPa with doubling of the primitive unit cell based on Rietveld refinements. The pores begin to collapse with a strong increase in their ellipticity. Upon decreasing the pressure below this value the initial structure was not recovered. DFT calculations indicate that the initial empty pore Cmc2(1) phase is dynamically unstable. Irreversible, progressive pressure-induced amorphization occurs upon further increases in pressure up to 21 GPa. These changes are confirmed in the mid-and far-infrared spectra by peak splitting at the Cmc2(1) to Pbn2(1) phase transition and strong peak broadening at high pressure due to amorphization.
Published: 2017
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34. Spin-asymmetric Josephson plasma oscillations

Author: Giocomo Valtolina, Päivi Törmä, Juha M Kreula, Department of Applied Physics, European Laboratory for Non-linear Spectroscopy (LENS), Aalto-yliopisto, and Aalto University
Subjects: Josephson effect, FOS: Physical sciences, Plasma oscillation, 01 natural sciences, 010305 fluids & plasmas, law.invention, Superconductivity (cond-mat.supr-con), Pi Josephson junction, law, Condensed Matter::Superconductivity, 0103 physical sciences, 010306 general physics, Quantum tunnelling, Physics, Superconductivity, Condensed Matter::Quantum Gases, Condensed matter physics, ta114, Condensed Matter - Superconductivity, superconductivity, SQUID, Quantum Gases (cond-mat.quant-gas), quantum physics, Superconducting tunnel junction, Condensed Matter::Strongly Correlated Electrons, Quantum Physics (quant-ph), Fermi gas, Condensed Matter - Quantum Gases
Abstract: The spin-asymmetric Josephson effect is a proposed quantum-coherent tunnelling phenomenon where Cooper-paired fermionic spin-$\frac{1}{2}$ particles, which are subjected to spin-dependent potentials across a Josephson junction, undergo frequency-synchronized alternating-current Josephson oscillations with spin-dependent amplitudes. Here, in line with present-day techniques in ultracold Fermi gas setups, we consider the regime of small Josephson oscillations and show that the Josephson plasma oscillation amplitude becomes spin-dependent in the presence of spin-dependent potentials while the Josephson plasma frequency is the same for both spin-components. Detecting these spin-dependent Josephson plasma oscillations provides a possible means to establish the yet-unobserved spin-asymmetric Josephson effect with ultracold Fermi gases using existing experimental tools., 11 pages, 5 figures
Published: 2017

35. Highly-selective semiconducting single walled carbon nanotubes separation for optoelectronic at telecom wavelength

Author: Keita, Al-Saleh, Balestrieri, Matteo, Duran-Valdeiglesias, Elena, Sarti, Francesco, Caselli, Niccolò, Le Roux, Xavier, Zhang, H., Cassan, Eric, Alonso-Ramos, C, Bezugly, Viktor, Biccari, Francesco, Vinattieri, Anna, Cuniberti, Gianaurelio, Gurioli, Massimo, Derycke, Vincent, Vivien, Laurent, Filoramo, Arianna, Laboratoire Innovation en Chimie des Surfaces et NanoSciences (LICSEN UMR 3685), Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M) (NIMBE UMR 3685), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut d'électronique fondamentale (IEF), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Firenze = University of Florence (UniFI), European Laboratory for Non-Linear Spectroscopy (LENS), Leibniz Institute for Solid State and Materials Research (IFW Dresden), Leibniz Association, Laboratoire Innovation en Chimie des Surfaces et NanoSciences (LICSEN), and Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI)
Subjects: [CHIM.MATE]Chemical Sciences/Material chemistry, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2016

36. Synthesis of 1D Polymer/Zeolite Nanocomposites under High Pressure

Author: Jérôme Rouquette, Francesco Di Renzo, Arie van der Lee, Olivier Cambon, Julien Haines, Jean-Marc Thibaud, Demetrio Scelta, Gaston Garbarino, Roberto Bini, Mario Santoro, Kamil Dziubek, Patrick Hermet, Federico A. Gorelli, Matteo Ceppatelli, Istituto Nazionale di Ottica (INO), Consiglio Nazionale delle Ricerche (CNR), European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Istituto di Chimica dei Composti Organometallici (ICCOM), Adam Mickiewicz University in Poznań (UAM), European Synchrotron Radiation Facility (ESRF), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Institut Européen des membranes (IEM), Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM), and ANR-10-LABX-0005,CheMISyst,CHEmistry of Molecular and Interfacial Systems(2010)
Subjects: Materials science, General Chemical Engineering, Polycarbonyl, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Diamond anvil cell, chemistry.chemical_compound, Polyacetylene, Materials Chemistry, [CHIM]Chemical Sciences, Composite material, Zeolite, ComputingMilieux_MISCELLANEOUS, chemistry.chemical_classification, Nanocomposite, General Chemistry, Polymer, 021001 nanoscience & nanotechnology, 0104 chemical sciences, chemistry, Ton, 0210 nano-technology, Carbon, Polymer/Zeolite Nanocomposites, High Pressure
Abstract: Recently, simple carbon based polymers have been synthesized at high pressures in silicalite, a pure SiO2 zeolite with a 3D system of mutually interconnected microchannels. These protocols permitted otherwise unstable polymers to be stabilized and protected from the atmosphere and to obtain an entirely novel class of nanocomposites with modified physical properties. In these 3-D systems, channel interconnection may prevent ideal, isolated polymer chains to be obtained. In this work, the :high pressure (5-10 GPa) synthesis of two archetypal, linear polymers polyacetylene (PA) and polycarbonyl (pCO) in the 1D channel system of the pure SiO2 zeolite ZSM-22 (TON) has been performed. The two resulting nano composites PA/TON and pCO/TON are organic/inorganic composite materials, which are good candidates as highly directional semiconductors and high energy density materials, respectively. The synthesis was performed in diamond anvil cells, starting from dense C2H2 and CO, confined in ZSM-22, and the nanocomposites were recovered at ambient conditions. The monomer polymerization was proven by IR spectroscopy and synchrotron X-ray diffraction measurements. DFT calculations were performed in order to obtain insight about the configurations of the 1D embedded polymers.
Published: 2016
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37. Mott Transition for Strongly-Interacting 1D Bosons in a Shallow Periodic Potential

Author: Boéris, Guilhem, Gori, Lorenzo, Hoogerland, Marteen D., Kumar, Avinash, Lucioni, Eleonora, Tanzi, Luca, Inguscio, Massimo, Giamarchi, Thierry, D 'errico, Chiara, Carleo, Giuseppe, Modugno, Giovanni, Sanchez-Palencia, Laurent, Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), Université Paris-Sud - Paris 11 (UP11)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS), European Laboratory for Non-linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence (UniFI), University of Auckland [Auckland], Istituto Nazionale di Ricerca Metrologica (INRiM), Université de Genève = University of Geneva (UNIGE), European Project: 256294,EC:FP7:ERC,ERC-2010-StG_20091028,ALOGLADIS(2011), European Project: 327143,EC:FP7:PEOPLE,FP7-PEOPLE-2012-IEF,MASCARA(2013), European Project: 641122,H2020,H2020-FETPROACT-2014,QUIC(2015), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS), LENS - Università di Firenze, and Université de Genève (UNIGE)
Subjects: Condensed Matter::Quantum Gases, [PHYS.COND.GAS]Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas], Quantum Gases (cond-mat.quant-gas), FOS: Physical sciences, Condensed Matter::Strongly Correlated Electrons, Condensed Matter - Quantum Gases
Abstract: We investigate the superfluid-insulator transition of one-dimensional interacting Bosons in both deep and shallow periodic potentials. We compare a theoretical analysis based on Monte-Carlo simulations in continuum space and Luttinger liquid approach with experiments on ultracold atoms with tunable interactions and optical lattice depth. Experiments and theory are in excellent agreement. It provides a quantitative determination of the critical parameter for the Mott transition and defines the regime of validity of widely used approximate models, namely the Bose-Hubbard and sine-Gordon models, Comment: Technical problem in references fixed. Text and figures identical to version 1
Published: 2016
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38. Radiation induced force between two planar waveguides

Author: Iacopo Carusotto, Mauro Antezza, Alessio Recati, Francesco Riboli, European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Dipartimento di Fisica [Povo], and Università degli Studi di Trento (UNITN)
Subjects: [PHYS]Physics [physics], Physics, ELECTROMAGNETIC FORCE, Antisymmetric relation, FOS: Physical sciences, Radiation induced, CONFINING LIGHT, 01 natural sciences, Molecular physics, Atomic and Molecular Physics, and Optics, Condensed Matter - Other Condensed Matter, 010309 optics, Formalism (philosophy of mathematics), ENHANCEMENT, Planar, 0103 physical sciences, Slab, PACS numbers: 03.50.De, 41.20.-q, 42.79.Gn, PARTICLE, 010306 general physics, Physics - Optics, Optics (physics.optics), Other Condensed Matter (cond-mat.other)
Abstract: We study the electromagnetic force exerted on a pair of parallel slab waveguides by the light propagating through them. We have calculated the dependence of the force on the slab separation by means of the Maxwell--Stress tensor formalism and we have discussed its main features for the different propagation modes: spatially symmetric (antisymmetric) modes give rise to an attractive (repulsive) interaction. We have derived the asymptotic behaviors of the force at small and large separation and we have quantitatively estimated the mechanical deflection induced on a realistic air-bridge structure., Comment: 10 pages, 6 figures
Published: 2007
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39. High Pressure Synthesis of All-Transoid Polycarbonyl [-(C=O)-]n in a Zeolite

Author: Patrick Hermet, Kamil Dziubek, Jean-Marc Thibaud, Demetrio Scelta, Arie van der Lee, Roberto Bini, Jérôme Rouquette, Francesco Di Renzo, Federico A. Gorelli, Julien Haines, Matteo Ceppatelli, Olivier Cambon, Mario Santoro, Istituto Nazionale di Ottica (INO), Consiglio Nazionale delle Ricerche (CNR), European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Adam Mickiewicz University in Poznań (UAM), Istituto di Chimica dei Composti Organometallici (ICCOM), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Institut Européen des membranes (IEM), Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM), LABEX CheMISyst, PICS CNRS/CNR, and ANR-10-LABX-0005,CheMISyst,CHEmistry of Molecular and Interfacial Systems(2010)
Subjects: Materials science, Nanocomposite, General Chemical Engineering, Polycarbonyl, General Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, chemistry.chemical_compound, high pressure, chemistry, High pressure, Polymer chemistry, Materials Chemistry, DAC, poly-CO, zeolite, Zeolite, ComputingMilieux_MISCELLANEOUS
Abstract: A study was conducted to demonstrate the synthesis of high pressure synthesis of all-transoid polycarbonyl [-(C=O)]n in a zeolite. The study also demonstrated the feasibility of inducing the self-assembly of dense CO in the spatially subnano-confined region of the channels of an electrically neutral, non-catalytic, hydrophobic, and all SiO2 zeolite silicalite. It was observed that the insertion of simple guest molecules, such as Ar and CO2 in the channels of this zeolite deactivated the pressure induced amorphization of the framework up to at least 25 GPa.
Published: 2015
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40. Monitoring the intramolecular charge transfer process in the Z907 solar cell sensitizer: a transient Vis and IR spectroscopy and ab initio investigation

Author: Paolo Foggi, Maria Grazia Lobello, Nicolò Azzaroli, Laura Bussotti, Alessandro Iagatti, Filippo De Angelis, Giuseppe Calogero, Mariangela Di Donato, Mariachiara Pastore, Andrea Lapini, Computational Laboratory for Hybrid/Organic Photovoltaics (CLHYO), Istituto di Scienze e Tecnologie Molecolari = Institute of Molecular Science and Technologies (ISTM-CNR [Perugia - Milano]), European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Dipartimento di Chimica [Perugia], and Università degli Studi di Perugia (UNIPG)
Subjects: EFFICIENCY, DYE, Infrared, Ab initio, INTERFACIAL ELECTRON-TRANSFER, General Physics and Astronomy, Infrared spectroscopy, NANOCRYSTALLINE TIO2 FILMS, THIN-FILMS, ULTRAFAST DYNAMICS, INJECTION DYNAMICS, COMPLEXES, STATE, RUTHENIUM, Photochemistry, 7. Clean energy, Physical and Theoretical Chemistry, Triplet state, ComputingMilieux_MISCELLANEOUS, Chemistry, Hydrogen bond, Time-dependent density functional theory, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, solar cell sensitizer, Excited state, Density functional theory
Abstract: We have analyzed the excited state dynamics of the heteroleptic [(NCS)2Ru(bpy-(COOH)2)(bpy-(C6H13)2)] Z907 solar cell sensitizer in solution and when adsorbed onto thin TiO2 films, by combining transient visible and infrared (IR) spectroscopies with ab initio Density Functional Theory (DFT) and Time-Dependent DFT (TDDFT) calculations. Upon excitation with ultra-short pulses in ethanol and dimethyl-sulphoxide solutions, the visible spectra show the appearance of a positive signal around 650 nm, within the instrumental time resolution (2) charge transfer (LML'CT). Vibrational cooling is observed in both solvents; in ethanol it is overtaken by the hydrogen bond dynamics. On the basis of DFT/TDDFT calculations, explicitly modeling the interaction of the NCS and COOH groups with solvent (ethanol) molecules, we rationalize the observed IR and visible spectral evolution as arising from the change in the hydrogen-bond network, which accompanies the transition to the lowest-energy triplet state. This interpretation provides a consistent explanation of what is also observed in the transient visible spectra. Transient IR measurements repeated for molecules adsorbed on TiO2 and ZrO2 films, allow us to identify the structural changes signaling the dye triplet excited state formation and evidence multiexponential electron injection rates into the semiconductor TiO2 film.
Published: 2015
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41. Mesoscopic Rydberg-blockaded ensembles in the superatom regime and beyond

Author: Thomas Niederprüm, Torsten Manthey, Oliver Thomas, Herwig Ott, Tobias Weber, Michael Fleischhauer, Giovanni Barontini, Michael Höning, Vera Guarrera, Science et Ingénierie des Matériaux et Procédés (SIMaP), Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Chimie du CNRS (INC)-Institut National Polytechnique de Grenoble (INPG), Systèmes de Référence Temps Espace (SYRTE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), European Laboratory for Non-linear Spectroscopy (LENS), LENS - Università di Firenze, Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Università degli Studi di Firenze = University of Florence (UniFI)
Subjects: Physics, [PHYS]Physics [physics], Mesoscopic physics, Quantum Physics, Atomic Physics (physics.atom-ph), Superatom, General Physics and Astronomy, FOS: Physical sciences, 3. Good health, Physics - Atomic Physics, symbols.namesake, Quantum Gases (cond-mat.quant-gas), Quantum mechanics, Rydberg formula, symbols, Physics::Atomic Physics, Atomic physics, Quantum Physics (quant-ph), Condensed Matter - Quantum Gases, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Quantum
Abstract: Controlling strongly interacting many-body systems enables the creation of tailored quantum matter, with properties transcending those based solely on single particle physics. Atomic ensembles which are optically driven to a Rydberg state provide many examples of this, such as atom-atom entanglement, many-body Rabi oscillations, strong photon-photon interaction and spatial pair correlations. In its most basic form, Rydberg quantum matter consists of an isolated ensemble of strongly interacting atoms spatially confined to the blockade volume - a so-called superatom. Here we demonstrate the controlled creation and characterization of an isolated mesoscopic superatom by means of accurate density engineering and excitation to Rydberg $p$-states. Its variable size allows to investigate the transition from effective two-level physics for strong confinement to many-body phenomena in extended systems. By monitoring continuous laser-induced ionization we observe a strongly anti-bunched ion emission under blockade conditions and extremely bunched ion emission under off-resonant excitation. Our experimental setup enables in vivo measurements of the superatom, yielding insight into both excitation statistics and dynamics. We anticipate straightforward applications in quantum optics and quantum information as well as future experiments on many-body physics., 7 pages, 5 figures
Published: 2015
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42. Molding light transport in disordered photonic structures

Author: VYNCK, Kevin, CONLEY, Gaurasundar M., PRATESI, Filippo, BURRESI, Matteo, WIERSMA, Diederik S., European Laboratory for Non-linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), lp2n-03,lp2n-13, Laboratoire Photonique, Numérique et Nanosciences (LP2N), Université Sciences et Technologies - Bordeaux 1-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS), Physics Department, University of Fribourg, Physics department, University of Fribourg, Istituto Nazionale di Ottica (INO), and Consiglio Nazionale delle Ricerche (CNR)
Subjects: [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2014

43. Scanning electron microscopy of Rydberg-excited Bose–Einstein condensates

Author: P. Langer, Giovanni Barontini, Thomas Niederprüm, Torsten Manthey, Vera Guarrera, Herwig Ott, Tobias Weber, Department of Oncology and Hematology, University Hospital Halle, Laboratoire national de métrologie et d'essais - Systèmes de Référence Temps-Espace (LNE - SYRTE), Systèmes de Référence Temps Espace (SYRTE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), European Laboratory for Non-linear Spectroscopy (LENS), LENS - Università di Firenze, and Università degli Studi di Firenze = University of Florence (UniFI)
Subjects: Atomic Physics (physics.atom-ph), FOS: Physical sciences, General Physics and Astronomy, 01 natural sciences, 010305 fluids & plasmas, law.invention, Ion, Physics - Atomic Physics, symbols.namesake, law, 0103 physical sciences, Microscopy, Physics::Atomic and Molecular Clusters, Physics::Atomic Physics, 010306 general physics, ComputingMilieux_MISCELLANEOUS, Physics, Condensed Matter::Quantum Gases, [PHYS]Physics [physics], Resolution (electron density), Quantum Physics, 3. Good health, Quantum Gases (cond-mat.quant-gas), Excited state, Rydberg atom, Rydberg formula, symbols, Atomic physics, Condensed Matter - Quantum Gases, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Excitation, Bose–Einstein condensate
Abstract: We report on the realization of high resolution electron microscopy of Rydberg-excited ultracold atomic samples. The implementation of an ultraviolet laser system allows us to excite the atom, with a single-photon transition, to Rydberg states. By using the electron microscopy technique during the Rydberg excitation of the atoms, we observe a giant enhancement in the production of ions. This is due to $l$-changing collisions, which broaden the Rydberg level and therefore increase the excitation rate of Rydberg atoms. Our results pave the way for the high resolution spatial detection of Rydberg atoms in an atomic sample.
Published: 2014
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44. Light Transport and Localization in Two-Dimensional Correlated Disorder

Author: Kevin Vynck, Gaurasundar M. Conley, Matteo Burresi, Filippo Pratesi, Diederik S. Wiersma, European Laboratory for Non-linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Physics Department, University of Fribourg, Physics department, University of Fribourg, Istituto Nazionale di Ottica (INO), Consiglio Nazionale delle Ricerche (CNR), Institut Langevin - Ondes et Images (UMR7587) (IL), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Italian National Research Council (CNR) through the 'EFOR' project, European Project: 291349,EC:FP7:ERC,ERC-2011-ADG_20110209,PHOTBOTS(2012), Università degli Studi di Firenze = University of Florence (UniFI), Department of Physics [Fribourg], Université de Fribourg = University of Fribourg (UNIFR), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Optics and Photonics, Photons, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Condensed Matter - Mesoscale and Nanoscale Physics, Light, Scattering, business.industry, Mean free path, General Physics and Astronomy, FOS: Physical sciences, Models, Theoretical, Planar, Optics, Orders of magnitude (time), Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Anisotropy, Scattering, Radiation, Statistical physics, Photonics, business, Structure factor, ComputingMilieux_MISCELLANEOUS, Optics (physics.optics), Physics - Optics
Abstract: Structural correlations in disordered media are known to affect significantly the propagation of waves. In this article, we theoretically investigate the transport and localization of light in 2D photonic structures with short-range correlated disorder. The problem is tackled semi-analytically using the Baus-Colot model for the structure factor of correlated media and a modified independent scattering approximation. We find that short-range correlations make it possible to easily tune the transport mean free path by more than a factor of 2 and the related localization length over several orders of magnitude. This trend is confirmed by numerical finite-difference time-domain calculations. This study therefore shows that disorder engineering can offer fine control over light transport and localization in planar geometries, which may open new opportunities in both fundamental and applied photonics research., 5 pages, 3 figures
Published: 2014
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45. Observation of a disordered bosonic insulator from weak to strong interactions

Author: L. Tanzi, Lorenzo Gori, E. Lucioni, Massimo Inguscio, Giovanni Modugno, Guillaume Roux, Chiara D'Errico, Thierry Giamarchi, Ian P. McCulloch, European Laboratory for Non-linear Spectroscopy (LENS), LENS - Università di Firenze, Istituto Nazionale di Ottica (INO), Consiglio Nazionale delle Ricerche (CNR), Laboratoire de Physique Théorique et Modèles Statistiques (LPTMS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Centre for Engineered Quantum Systems, University of Queensland [Brisbane], Département de Physique de la Matière Condensée (DPMC), Université de Genève (UNIGE), and Istituto Nazionale di Ricerca Metrologica (INRiM)
Subjects: Physics, Condensed Matter::Quantum Gases, Optical lattice, Anderson localization, Phase transition, Condensed matter physics, [PHYS.COND.GAS]Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas], Condensed Matter::Other, Mott insulator, Strong interaction, General Physics and Astronomy, FOS: Physical sciences, ddc:500.2, disorder, Disordered Systems and Neural Networks (cond-mat.dis-nn), Condensed Matter - Disordered Systems and Neural Networks, Bose Glass, Condensed Matter::Disordered Systems and Neural Networks, law.invention, law, Ultracold atom, Quantum Gases (cond-mat.quant-gas), Condensed Matter - Quantum Gases, Bose–Einstein condensate, Boson
Abstract: International audience; We employ ultracold atoms with controllable disorder and interaction to study the paradigmatic problem of disordered bosons in the full disorder-interaction plane. Combining measurements of coherence, transport and excitation spectra, we get evidence of an insulating regime extending from weak to strong interaction and surrounding a superfluid-like regime, in general agreement with the theory. For strong interaction, we reveal the presence of a strongly-correlated Bose glass coexisting with a Mott insulator.
Published: 2014
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46. Test of the Universality of the Three-Body Efimov Parameter at Narrow Feshbach Resonances

Author: Marco Fattori, Andrea Simoni, Massimo Inguscio, G. Spagnolli, Manuelle Landini, Giovanni Modugno, Andreas Trenkwalder, Giulia Semeghini, Sanjukta Roy, European Laboratory for Non-linear Spectroscopy (LENS), LENS - Università di Firenze, Institut de Physique de Rennes (IPR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Firenze = University of Florence (UniFI), and Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Condensed Matter::Quantum Gases, Physics, PACS 34.50 Cx, [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], [PHYS.COND.GAS]Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas], Scattering, General Physics and Astronomy, Scattering length, efimov states feshbach resonances ultracold atoms, 01 natural sciences, 010305 fluids & plasmas, Universality (dynamical systems), symbols.namesake, [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], Quantum mechanics, 0103 physical sciences, Bound state, symbols, Van der Waals radius, Atomic physics, 010306 general physics
Abstract: International audience; We measure the critical scattering length for the appearance of the first three-body bound state, or Efimov three-body parameter, at seven different Feshbach resonances in ultracold 39K atoms. We study both intermediate and narrow resonances, where the three-body spectrum is expected to be determined by the nonuniversal coupling of two scattering channels. Instead, our observed ratio of the three-body parameter with the van der Waals radius is approximately the same universal ratio as for broader resonances. This unexpected observation suggests the presence of a new regime for three-body scattering at narrow resonances.
Published: 2013
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47. Direct evaporative cooling of39K atoms to Bose-Einstein condensation

Author: Manuele Landini, Massimo Inguscio, Giacomo Roati, Giovanni Modugno, Andrea Simoni, Sanjukta Roy, Marco Fattori, European Laboratory for Non-linear Spectroscopy (LENS), LENS - Università di Firenze, Institut de Physique de Rennes (IPR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Firenze = University of Florence (UniFI), and Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Sympathetic cooling, Atom interferometer, Atomic Physics (physics.atom-ph), PHASE, SOLITON, CESIUM, FOS: Physical sciences, GASES, 7. Clean energy, 01 natural sciences, Physics - Atomic Physics, 010305 fluids & plasmas, law.invention, Raman cooling, law, Laser cooling, 0103 physical sciences, FESHBACH RESONANCES, Physics::Atomic and Molecular Clusters, Physics::Atomic Physics, 010306 general physics, Condensed Matter::Quantum Gases, Physics, Quantum Physics, Condensed Matter::Other, Condensation, [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph], Atomic and Molecular Physics, and Optics, Dipole, Quantum Gases (cond-mat.quant-gas), 13. Climate action, Atomic physics, Quantum Physics (quant-ph), Condensed Matter - Quantum Gases, Realization (systems), Bose–Einstein condensate
Abstract: We report the realization of Bose-Einstein condensates of 39K atoms without the aid of an additional atomic coolant. Our route to Bose-Einstein condensation comprises Sub Doppler laser cooling of large atomic clouds with more than 10^10 atoms and evaporative cooling in optical dipole traps where the collisional cross section can be increased using magnetic Feshbach resonances. Large condensates with almost 10^6 atoms can be produced in less than 15 seconds. Our achievements eliminate the need for sympathetic cooling with Rb atoms which was the usual route implemented till date due to the unfavourable collisional property of 39K. Our findings simplify the experimental set-up for producing Bose-Einstein condensates of 39K atoms with tunable interactions, which have a wide variety of promising applications including atom-interferometry to studies on the interplay of disorder and interactions in quantum gases., 7 pages, 6 figures
Published: 2012
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48. Carbon monoxide recombination dynamics in truncated hemoglobins studied with visible-pump midIR-probe spectroscopy

Author: Barbara Patrizi, Roberto Righini, Agnese Marcelli, Natascia Sciamanna, Alberto Boffi, Mariangela Di Donato, Manuela Lima, Andrea Lapini, Paolo Foggi, European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Istituto Nazionale di Ottica (INO), Consiglio Nazionale delle Ricerche (CNR), Dipartimento di Chimica [Perugia], Università degli Studi di Perugia (UNIPG), Department of Biochemical Sciences 'Rossi Fanelli', Institut Pasteur, Fondation Cenci Bolognetti - Istituto Pasteur Italia, Fondazione Cenci Bolognetti, and Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome]
Subjects: MESH: Photolysis, Light, Spectrophotometry, Infrared, Infrared, HEME POCKET, Heme, 010402 general chemistry, Photochemistry, 01 natural sciences, INFRARED-SPECTROSCOPY, BACILLUS-SUBTILIS, 03 medical and health sciences, chemistry.chemical_compound, Actinomycetales, Materials Chemistry, [SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology, Physical and Theoretical Chemistry, Spectroscopy, 030304 developmental biology, OXYGEN SENSOR FIXL, 0303 health sciences, Carbon Monoxide, Photolysis, MESH: Kinetics, MESH: Spectrophotometry, Infrared, Photodissociation, Truncated Hemoglobins, PRIMARY DOCKING SITE, MESH: Bacillus subtilis, MESH: Light, 0104 chemical sciences, Surfaces, Coatings and Films, MESH: Actinomycetales, Kinetics, chemistry, Absorption band, MESH: Heme, MESH: Truncated Hemoglobins, MESH: Carbon Monoxide, Recombination, Carbon monoxide, Visible spectrum, Bacillus subtilis
Abstract: International audience; Carbon monoxide recombination dynamics upon photodissociation with visible light has been characterized by means of ultrafast visible-pump/MidIR probe spectroscopy for the truncated hemoglobins from Thermobifida fusca and Bacillus subtilis. Photodissociation has been induced by exciting the sample at two different wavelengths: 400 nm, corresponding to the heme absorption in the B-band, and 550 nm, in the Q-bands. The bleached iron-CO coordination band located at 1850-1950 cm(-1) and the free CO absorption band in the region 2050-2200 cm(-1) have been observed by probe pulses tuned in the appropriate infrared region. The kinetic traces measured at 1850-1950 cm(-1) reveal multiexponential subnanosecond dynamics that have been interpreted as arising from fast geminate recombination of the photolyzed CO. A compared analysis of the crystal structure of the two proteins reveals a similar structure of their distal heme pocket, which contains conserved polar and aromatic amino acid residues closely interacting with the iron ligand. Although fast geminate recombination is observed in both proteins, several kinetic differences can be evidenced, which can be interpreted in terms of a different structural flexibility of the corresponding heme distal pockets. The analysis of the free CO band-shape and of its dynamic evolution brings out novel features about the nature of the docking site inside the protein cavity.
Published: 2012
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49. Following ligand migration pathways from picoseconds to milliseconds in type II truncated hemoglobin from Thermobifida fusca

Author: Alessandro Feis, Alessandra Bonamore, Darío A. Estrin, Cristiano Viappiani, Stefania Abbruzzetti, Agnese Marcelli, Stefano Bruno, Cristina Gellini, Alberto Boffi, Paolo Foggi, Pier Remigio Salvi, Juan Pablo Bustamante, European Laboratory for Non-Linear Spectroscopy (LENS), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Department of Physics, University of Parma = Università degli studi di Parma [Parme, Italie], Departamento de Química Inorgánica, Analítica y Química Física (DQIAQF), Facultad de Ciencias Exactas y Naturales [Buenos Aires] (FCEyN), Universidad de Buenos Aires [Buenos Aires] (UBA)-Universidad de Buenos Aires [Buenos Aires] (UBA), Department of Chemistry 'Ugo Schiff', Department of Biochemical Sciences 'Rossi Fanelli', Institut Pasteur, Fondation Cenci Bolognetti - Istituto Pasteur Italia, Fondazione Cenci Bolognetti, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome], Department of Biochemistry and Molecular Biology, Istituto Nazionale di Ottica (INO), Consiglio Nazionale delle Ricerche (CNR), Dipartimento di Chimica [Perugia], and Università degli Studi di Perugia (UNIPG)
Subjects: Time Factors, lcsh:Medicine, Photochemistry, Molecular Dynamics, Ligands, 01 natural sciences, Biochemistry, Biophysics Simulations, Physical Chemistry, purl.org/becyt/ford/1 [https], Computational Chemistry, FLASH PHOTOLYSIS, TRANSIENT ABSORTION AND OPTOACOUSTIC SPECTROSCOPY, MESH: Ligands, Biomacromolecule-Ligand Interactions, lcsh:Science, HEME-PROTEINS, 0303 health sciences, Carbon Monoxide, Multidisciplinary, Hemoproteins, MESH: Kinetics, Chemistry, Ciencias Químicas, Truncated Hemoglobins, VIBRATIONAL-RELAXATION, Ligand (biochemistry), Femtochemistry, Physicochemical Properties, Reaction Dynamics, Picosecond, Flash photolysis, MYCOBACTERIUM-TUBERCULOSIS, TIME-RESOLVED THERMODYNAMICS, MESH: Carbon Monoxide, CIENCIAS NATURALES Y EXACTAS, Recombination, Research Article, Protein Binding, MESH: Photolysis, PHOTOINDUCED PROCESSES, Absorption spectroscopy, Kinetics, MOLECULAR DYNAMICS SIMULATIONS, Biophysics, 010402 general chemistry, CO PHOTODISSOCIATION, 03 medical and health sciences, Ultrafast laser spectroscopy, Actinomycetales, purl.org/becyt/ford/1.4 [https], INTERNAL HYDROPHOBIC CAVITIES, MESH: Protein Binding, THERMOBIFIDA FUSCA TRUNCATED HEMOGLOBIN, Spettroscopia, dinamica di proteine, emoproteine batteriche, assorbimento transiente, laser flash photolysis, dinamica molecolare, fotoacustica, [SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology, CARBON-MONOXIDE, Biology, 030304 developmental biology, Photolysis, Otras Ciencias Químicas, Photodissociation, lcsh:R, MESH: Time Factors, Proteins, Computational Biology, 0104 chemical sciences, MESH: Actinomycetales, HORSE HEART MYOGLOBIN, Chemical Properties, LIGAND MIGRATION PATHWAYS, MESH: Truncated Hemoglobins, lcsh:Q, PHOTOACOUSTIC CALORIMETRY, TIME-RESOLVED THERMODYNAMICS, INTERNAL HYDROPHOBIC CAVITIES, HORSE HEART MYOGLOBIN, HEME-PROTEINS, MYCOBACTERIUM-TUBERCULOSIS, CARBON-MONOXIDE, PHOTOACOUSTIC CALORIMETRY, VIBRATIONAL-RELAXATION, PHOTOINDUCED PROCESSES, CO PHOTODISSOCIATION
Abstract: CO recombination kinetics has been investigated in the type II truncated hemoglobin from Thermobifida fusca (Tf-trHb) over more than 10 time decades (from 1 ps to 100 ms) by combining femtosecond transient absorption, nanosecond laser flash photolysis and optoacoustic spectroscopy. Photolysis is followed by a rapid geminate recombination with a time constant of 2 ns representing almost 60% of the overall reaction. An additional, small amplitude geminate recombination was identified at 100 ns. Finally, CO pressure dependent measurements brought out the presence of two transient species in the second order rebinding phase, with time constants ranging from 3 to 100 ms. The available experimental evidence suggests that the two transients are due to the presence of two conformations which do not interconvert within the time frame of the experiment. Computational studies revealed that the plasticity of protein structure is able to define a branched pathway connecting the ligand binding site and the solvent. This allowed to build a kinetic model capable of describing the complete time course of the CO rebinding kinetics to Tf-trHb. Fil: Marcelli, Agnese. European Laboratory for Non-Linear Spectroscopy; Italia Fil: Abbruzzetti, Stefania. Università di Parma; Italia Fil: Bustamante, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina Fil: Feis, Alessandro. University of Florence; Italia Fil: Bonamore, Alessandra. Università degli studi di Roma "La Sapienza"; Italia Fil: Boffi, Alberto. Università degli studi di Roma "La Sapienza"; Italia Fil: Gellini, Cristina. University of Florence; Italia Fil: Salvi, Pier R.. University of Florence; Italia Fil: Estrin, Dario Ariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina Fil: Bruno, Stefano. Università di Parma; Italia Fil: Viappiani, Cristiano. Università di Parma; Italia Fil: Foggi, Paolo. European Laboratory for Non-Linear Spectroscopy; Italia. University of Perugia; Italia
Published: 2012
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50. 2nd European Future Technologies Conference and Exhibition (FET)

Author: de Angelis, M., Angonin, Marie-Christine, Beaufils, Quentin, Becker, C., Bertoldi, Andrea, Bongs, Kai, Bourdel, T., Bouyer, P., Boyer, V., Dörscher, S., Duncker, H., Ertmer, Wolfgang, Fernholz, T., Fromhold, T. M., Herr, Waldemar, Kruger, P., Kurbis, C., Mellor, Cj, Pereira dos Santos, Franck, Peters, Achim, Poli, Nicola, Popp, M., Prevedelli, M., Rasel, Ernst Maria, Rudolph, J., Schreck, F., Sengstock, Klaus, Sorrentino, Fiodor, Stellmer, S., Tino, Guglielmo M., Valenzuela, T., Wendrich, T., Wicht, Andreas, Windpassinger, Patrick, Wolf, Peter, Istituto di Fisica dell'Atmosfera del CNR (IFA), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Systèmes de Référence Temps Espace (SYRTE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Interférométrie Atomique et Capteurs Inertiels, Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Théorie et métrologie, Institut für Laser-Physik, Universität Hamburg (ILP-HU), Tech Univ Darmstadt (TUD), Midlands Ultracold Atom Research Centre, School of Physics and Astronomy, University of Birmingham (MUARC-UB), Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), Midlands Ultracold Atom Research Centre, School of Physics and Astronomy, University of Nottingham (MUARC-UN), Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik (FBH), Humboldt University Of Berlin, European Laboratory for Non-Linear Spectroscopy (LENS), Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften (IQO-OAW), and Institut für Quantenoptik, Leibniz Universität Hannover
Subjects: [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract: International audience; We present iSense, a recently initiated FET project aiming to use Information and Communication Technologies (ICT) to develop a platform for portable quantum sensors based on cold atoms. A prototype of backpack-size highprecision force sensor will be built to demonstrate the concept.
Published: 2011
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