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Your search keyword '"Luigi Bonacina"' showing total 7 results
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7 results on '"Luigi Bonacina"'

1. Nonlinear optical properties of silicon carbide (SiC) nanoparticles by carbothermal reduction

Author

Cécile Joulaud, Alexander Yu. Kharin, D. Mishchuk, Yury V. Ryabchikov, Luigi Bonacina, I. Tishchenko, Victor Yu. Timoshenko, Yannick Mugnier, Andrii Rogov, Alain Géloën, Alexander Kyrychenko, Vladimir Lysenko, Anton Pastushenko, Jean-Pierre Wolf, R. Le Dantec, GAP Biophoton, University of Geneva, R&D Department, Laboratoire SYstèmes et Matériaux pour la MEcatronique (SYMME), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Apollon Solar, INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École Centrale de Lyon (ECL), Université de Lyon, Cardiovasculaire, métabolisme, diabétologie et nutrition (CarMeN), Institut National de la Recherche Agronomique (INRA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Hospices Civils de Lyon (HCL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Hospices Civils de Lyon (HCL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Institut National de la Recherche Agronomique (INRA)

Subjects
cell labelling, Materials science, [SDV]Life Sciences [q-bio], Physics::Optics, Nanoparticle, Nanotechnology, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Condensed Matter::Materials Science, chemistry.chemical_compound, symbols.namesake, Carbothermic reaction, Physics::Atomic and Molecular Clusters, Silicon carbide, semiconductor Nanoparticle, Rayleigh scattering, second harmonic generation, business.industry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Nonlinear system, chemistry, Excited state, Harmonic, symbols, multiphoton Microscopy, Optoelectronics, 0210 nano-technology, business, Luminescence
Abstract

International audience; SiC nanoparticles by carbothermal reduction show promising properties in terms of second harmonic and multiphoton excited luminescence. In particular, we estimate a nonlinear efficiency < d > = 17 pm/V, as obtained by Hyper Rayleigh Scattering. We also present results of cell labelling to demonstrate the potential use of SiC nanoparticles for nonlinear bioimaging by simultaneous detection of second harmonic and luminescence.

Published
2016
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2. Assessment of cytotoxicity and oxidative effect of Bismuth Ferrite (BFO) harmonic nanoparticles for localized DNA photo-interaction

Author

Daniel Ciepielewski, Solène Passemard, Davide Staedler, Sandrine Gerber-Lemaire, Thibaud Magouroux, Luigi Bonacina, and Jean-Pierre Wolf

Subjects
chemistry.chemical_classification, Reactive oxygen species, Materials science, Biocompatibility, chemistry.chemical_element, Second-harmonic generation, Nanoparticle, Nanotechnology, Photochemistry, Oxygen, chemistry.chemical_compound, chemistry, Cytotoxicity, Nanoscopic scale, Bismuth ferrite
Abstract

Bismuth Ferrite nanoparticles have been recently used to selectively interact with malignant cell DNA via in situ generated second harmonic in a novel theranostics protocol [Nanoscale 6(5), pp. 2929, 2014]. In this report, we extend the screening of biocompatibility of BFO uncoated uncoated nanoparticles and assess the nanoparticle- mediated production of reactive oxygen species as a function of excitation wavelength.

Published
2014
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3. Harmonic nanoparticles for nonlinar bio-imaging and detection

Author

Yannick Mugnier, Luigi Bonacina, Jean-Pierre Wolf, Solène Passemard, Daniel Rytz, Davide Staedler, Sebastian Schwung, Andrii Rogov, Thibaud Magouroux, Cécile Joulaud, Ronan Le Dantec, Sandrine Gerber-Lemaire, Group of Applied Physics [Geneva] (GAP), University of Geneva [Switzerland], Femto (LCAR), Laboratoire Collisions Agrégats Réactivité (LCAR), Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Laboratoire SYstèmes et Matériaux pour la MEcatronique (SYMME), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), FEE, FEE GmBh, Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-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 des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), and Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées

Subjects
Materials science, Nonlinear microscopy, second harmonic generation, Rare event detection, [PHYS.MECA.GEME]Physics [physics]/Mechanics [physics]/Mechanical engineering [physics.class-ph], Nanoparticle, Second-harmonic generation, Nanotechnology, nonlinear microscopy, 02 engineering and technology, Contrast (music), 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, [SPI.MECA.GEME]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanical engineering [physics.class-ph], 0104 chemical sciences, Bio imaging, Microscopy, Harmonic, nanoparticles, 0210 nano-technology
Abstract

Proc. SPIE 8611; International audience; In this contribution we present the motivations underlying the introduction of harmonic nanoparticles, i.e. Second harmonic contrast agents for nonlinear microscopy. Their properties will be discussed in the light of various biological applications including imaging of stem cells and rare event detection in physiological media.

Published
2013
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4. Shaping light with MOEMS

Author

A. Bich, Hans Peter Herzig, J. Masson, Luigi Bonacina, Denis Kiselev, Reinhard Voelkel, K. J. Weible, S. Weber, Jérôme Extermann, Jean-Pierre Wolf, Roland Bitterli, Wilfried Noell, Toralf Scharf, and N. F. de Rooij

Subjects
micromirror array, System, Microelectromechanical systems, Materials science, vertical comb-drive, Array, Micromirror array, Pulse shaping, Digital micromirror device, law.invention, law, magnetic actuator, Femtosecond, Electronic engineering, Microtechnology, Adaptive optics, Dynamic linear diffuser, membrane, MEMS fs-laser pulse shaping, Diffuser (optics), Moems
Abstract

Shaping light with microtechnology components has been possible for many years. The Texas Instruments digital micromirror device (DMD) and all types of adaptive optics systems are very sophisticated tools, well established and widely used. Here we present, however, two very dedicated systems, where one is an extremely simple MEMS-based tunable diffuser, while the second device is complex micromirror array with new capabilities for femtosecond laser pulse shaping. Showing the two systems right next to each other demonstrates the vast options and versatility of MOEMS for shaping light in the space and time domain.

Published
2011
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5. Linear micromirror array for broadband femtosecond pulse shaping in phase and amplitude

Author

Denis Kiselev, Wilfried Noell, Stefan Weber, Jean-Pierre Wolf, Luigi Bonacina, Jérôme Extermann, Severin Waldis, and Nico F. de Rooij

Subjects
Femtosecond pulse shaping, Materials science, business.industry, Frequency band, Phase (waves), Physics::Optics, ddc:500.2, Laser, Pulse shaping, law.invention, Amplitude modulation, Optics, Amplitude, UV-NIR femtosecond laser pulse shaping, law, Femtosecond, Micromirrors, business, Vertical comb drives, Timed DRIE
Abstract

We are developing a linear array of micromirrors designed for optical, femtosecond laser pulse shaping. It is a bulkmicromachined device, capable of retarding or diminishing certain laser frequencies in order to perform phase and amplitude modulation within a frequency band spanning the UV to the near-infrared. The design consists of a linear array of mirrors fixed on either side by springs. They feature two degrees of freedom: Out-of-plane motion for phase shifting and rotational motion for binary amplitude modulation, both realized using vertical comb drives. The first applications will include femtosecond discrimination experiments on biomolecules.

Published
2009
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6. MEMS for femtosecond pulse shaping applications

Author

Jonathan Roslund, Ariana Rondi, Luigi Bonacina, Jérôme Extermann, Matthias Roth, Herschel Rabitz, Stefan Weber, and Jean-Pierre Wolf

Subjects
Microelectromechanical systems, Femtosecond pulse shaping, Optics, Optical modulator, Materials science, business.industry, Coherent control, Liquid crystal, Broadband, Phase (waves), business, Pulse shaping
Abstract

There are many potential applications for MEMS micromirror devices for femtosecond pulse shaping applications. Their broadband reflectivity gives them an advantage in comparison to devices such as liquid crystal- and acousto-optical modulators because of the possibility to directly shape UV pulses in the range 250 - 400 nm, and thus address UV-absorbing molecules. The identification and discrimination of biomolecules which exhibit almost the same spectra has sparked some interest in the last years as it allows real-time, environmental and optical monitoring. Here, we present the last developments using the Fraunhofer IPMS MEMS phase former capable of accomplishing such goals.

Published
2009
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7. TW lasers in air: ultra-high powers and optimal control strategies

Author

Albrecht Lindinger, Jérôme Extermann, C. Lepage, Michel Moret, E. Mazataud, Jérôme Kasparian, Luigi Bonacina, N. Blanchot, P. Canal, Ph. Rohwetter, S. Champeaux, A. Boscheron, M. Castaldi, Shaohui Li, Kamil Stelmaszczyk, Noëlle Lascoux, O. Hartmann, Luc Bergé, Jean-Pierre Wolf, R. Ackermann, D. Raffestin, Rami Salame, O. Bonville, G. Mennerat, E. Salmon, L. Patissou, C. Guet, L. Marmande, Pierre Béjot, and Ludger Wöste

Subjects
Physics, business.industry, Nonlinear optics, Laser, law.invention, Supercontinuum, Optics, Filamentation, law, Ionization, Chirp, business, Ultrashort pulse, Order of magnitude
Abstract

Filamentation, which arises in the propagation of ultrashort laser pulses when the defocusing on the generated plasma dynamically balances the Kerr self-focusing, is now well described on both the laboratory scale (millijoules to tens of millijoules, meters to tens of meters) and the atmospheric scale (hundreds of millijoules, hundreds of meters to kilometers). The scalability of this propagation regime to higher energies and powers is not a priori assured, as high-order nonlinear effects may prevent long distance propagation leading, for instance, to full beam collapse. We thus investigated the atmospheric propagation of the 26 J, 32 TW laser pulses delivered by the Alise beamline, which exceed respectively by one and two orders of magnitude the characteristic power and energy of ultrashort pulses studied so far. We show that filamentation still occurs at these extreme levels. More than 400 filaments simultaneously generate a supercontinuum propagating up to the stratosphere, beyond 20 km. This constitutes the highest power "white-light laser" to date. We also discuss the results of another experiment realized with the Teramobile laser facility: we demonstrated optimal control on the propagation of ultrashort 5 TW laser pulses in air over distances up to 36 m in a closed-loop scheme. We optimized three spectral ranges within the white-light continuum, as well as the ionization efficiency. Optimization results in signal enhancements by typical factors of 2 and 1.4 for the target parameters. In the case of white-light continuum generation, the feedback-driven procedure leads to shorter pulses by reducing their chirp, while, as far as air ionization is concerned, the optimization consists in correcting the pulse from its defects and setting the filamentation onset near the detector.

Published
2007
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