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1. External Control of Dissipative Coupling in a Heterogeneously Integrated Photonic Crystal—SOI Waveguide Optomechanical System

Author

Viktor Tsvirkun, Alessandro Surrente, Fabrice Raineri, Grégoire Beaudoin, Rama Raj, Isabelle Sagnes, Isabelle Robert-Philip, and Rémy Braive

Subjects
optomechanics, cavity optomechanics, photonic crystals, quantum dots, Applied optics. Photonics, TA1501-1820
Abstract

Cavity optomechanical systems with an enhanced coupling between mechanical motion and electromagnetic radiation have permitted the investigation of many novel physical effects. The optomechanical coupling in the majority of these systems is of dispersive nature: the cavity resonance frequency is modulated by the vibrations of the mechanical oscillator. Dissipative optomechanical interaction, where the photon lifetime in the cavity is modulated by the mechanical motion, has recently attracted considerable interest and opens new avenues in optomechanical control and sensing. In this work we demonstrate an external optical control over the dissipative optomechanical coupling strength mediated by the modulation of the absorption of a quantum dot layer in a hybrid optomechanical system. Such control enhances the capability of tailoring the optomechanical coupling of our platform, which can be used in complement to the previously demonstrated control of the relative (dispersive to dissipative) coupling strength via the geometry of the integrated access waveguide.

Published
2016
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2. Chronic intestinal pseudoobstruction: difficulties in diagnosis and treatment. Case report

Author

Viktor Tsvirkun, Igor Khatkov, A I Parfenov, Daniil A. Degterev, S V Bykova, Elena V. Novikova, Kirill Shishin, Zoia P. Lashchenkova, L M Krums, O V Akhmadullina, Sergei G. Khomeriki, Valerii V. Subbotin, and Tatiana N. Kuzmina

Subjects
Adult, History, Pediatrics, medicine.medical_specialty, Malabsorption, malabsorption, Colon, medicine.drug_class, Endocrinology, Diabetes and Metabolism, Antibiotics, parenteral nutrition, law.invention, Young Adult, bacterial overgrowth syndrome, law, prokinetics, chronic intestinal pseudoobstruction, Humans, Medicine, business.industry, Intestinal Pseudo-Obstruction, intestinal decompression, General Medicine, colon malrotation, medicine.disease, Intensive care unit, Intestinal decompression, Anti-Bacterial Agents, Chronic intestinal pseudoobstruction, Transplantation, Parenteral nutrition, Chronic Disease, neuromyopathy, SMALL BOWEL BACTERIAL OVERGROWTH, Blind Loop Syndrome, Family Practice, business
Abstract

The article presents a clinical case of a 23-year-old patient with an extremely severe congenital form of chronic intestinal pseudoobstruction coupled with a neuromyopathy,colon malrotation, malabsorption, bacterial overgrowth syndrome, cholelithiasis and gastrostasis, which excluded bowel transplantation. Long-term treatment in the intensive care unit with combined, mainly parenteral nutrition for 6 months, using antibiotics, prokinetics, intestinal decompression allowed to achieve partial stabilization of the patients condition and transfer to home treatment with the continuation of adequate complex therapy.Представлено клиническое наблюдение больной 23 лет с крайне тяжелой врожденной формой хронической интестинальной псевдообструкции с нейромиопатией. мальротацией толстой кишки, мальабсорбцией, синдромом избыточного бактериального роста, холелитиазом, гастростазом, исключавшим выполнение трансплантации кишечника. Длительное лечение в отделении интенсивной терапии с комбинированным, преимущественно парентеральным питанием в течение 6 мес, применением антибиотиков, прокинетиков, кишечной декомпрессии позволило добиться частичной стабилизации состояния и перевода пациентки на домашнее лечение с продолжением адекватной комплексной терапии.

Published
2021
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3. Double clad tubular anti-resonant hollow core fiber for nonlinear microendoscopy

Author

Vasyl Mytskaniuk, D. Septier, Géraud Bouwmans, Alexandre Kudlinski, Viktor Tsvirkun, Olivier Vanvincq, Andy Cassez, Karen Baudelle, Rémi Habert, Hervé Rigneault, A. Pastre, Marc Douay, Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche sur les Composants logiciels et matériels pour l'Information et la Communication Avancé - USR 3380 (IRCICA), Institut FRESNEL (FRESNEL), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), MOSAIC (MOSAIC), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), and ANR-19-CE19-0019,MEAP,Endomicroscopie multiphotonique des plaques athérosclérotiques(2019)

Subjects
Hollow core, Total internal reflection, Fabrication, Materials science, business.industry, Physics::Optics, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Atomic and Molecular Physics, and Optics, Light scattering, Numerical aperture, 010309 optics, Nonlinear system, symbols.namesake, Optics, 0103 physical sciences, symbols, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Fiber, 0210 nano-technology, business, Raman scattering
Abstract

International audience; We report the fabrication and characterization of the first double clad tubular anti-resonant hollow core fiber. It allows to deliver ultrashort pulses without temporal nor spectral distortions in the 700-1000 nm wavelength range and to efficiently collect scattered light in a high numerical aperture double clad. The output fiber mode is shaped with a silica microsphere generating a photonic nanojet, making it well suitable for nonlinear microendoscopy application. Additionally, we provide an open access software allowing to find optimal drawing parameters for the fabrication of tubular hollow core fibers.

Published
2020
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5. Single-shot non-interferometric measurement of the phase transmission matrix in multicore fibers

Author

Géraud Bouwmans, Viktor Tsvirkun, Hervé Rigneault, Siddharth Sivankutty, Dan Oron, Esben Ravn Andresen, Miguel A. Alonso, MOSAIC (MOSAIC), Institut FRESNEL (FRESNEL), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Department of Physics of Complex Systems, Weizmann Institute of Science [Rehovot, Israël], Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), and Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)

Subjects
Multi-core processor, Materials science, business.industry, Single shot, Phase (waves), FOS: Physical sciences, Transmission matrix, 02 engineering and technology, 01 natural sciences, Atomic and Molecular Physics, and Optics, 010309 optics, Interferometry, 020210 optoelectronics & photonics, Optics, Aperiodic graph, Simple (abstract algebra), 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Phase retrieval, business, Optics (physics.optics), Physics - Optics
Abstract

A simple technique for far-field single-shot non-interferometric determination of the phase transmission matrix of a multicore fiber with over 100 cores is presented. This phase retrieval technique relies on the aperiodic arrangement of the cores., Submitted to Optics Letters

Published
2018
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6. Nonlinear imaging through a Fermat’s golden spiral multicore fiber

Author

Viktor Tsvirkun, Esben Ravn Andresen, Géraud Bouwmans, Hervé Rigneault, Olivier Vanvincq, Siddharth Sivankutty, Institut FRESNEL (FRESNEL), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), Université de Lille-Centre National de la Recherche Scientifique (CNRS), MOSAIC (MOSAIC), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), and Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)

Subjects
Physics, Focal point, business.industry, Femtosecond pulse, media_common.quotation_subject, Field of view, 02 engineering and technology, Multicore fiber, 01 natural sciences, Atomic and Molecular Physics, and Optics, 010309 optics, Nonlinear system, 020210 optoelectronics & photonics, Optics, 0103 physical sciences, Golden spiral, 0202 electrical engineering, electronic engineering, information engineering, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Contrast (vision), business, Group delay and phase delay, media_common
Abstract

International audience; We report two-photon lensless imaging through a novel golden spiral multicore fiber. This unique layout optimizes the sidelobe levels, field of view, cross-talk, group delay and mode density to achieve a sidelobe contrast of atleast 10.9 dB. We demonstrate experimentally the ability to generate and scan a focal point with a femtosecond pulse and perform two-photon imaging.

Published
2018
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7. Bending-induced inter-core group delays in multicore fibers

Author

Viktor Tsvirkun, Esben Ravn Andresen, Géraud Bouwmans, Olivier Vanvincq, Siddharth Sivankutty, Hervé Rigneault, Laboratoire de photonique et de nanostructures (LPN), Centre National de la Recherche Scientifique (CNRS), Institut FRESNEL (FRESNEL), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), MOSAIC (MOSAIC), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), and Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)

Subjects
OCIS: 060.2400, 060.2430, 110.2350, 02 engineering and technology, Bending, 01 natural sciences, 010309 optics, Optics, 0103 physical sciences, Fiber, skin and connective tissue diseases, Fiber optics imaging, Group delay and phase delay, Fiber properties, Coupling, Physics, Quantitative Biology::Biomolecules, business.industry, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, Amplitude, Polarization mode dispersion, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Physics::Accelerator Physics, 0210 nano-technology, business, Ultrashort pulse, Refractive index, fibers single-mode
Abstract

International audience; We examine the impact of fiber bends on ultrashort pulse propagation in a 169-core multicore fiber (MCF) by numerical simulations and experimental measurements. We show that an L-shaped bend (where only one end of the MCF is fixed) induces significant changes in group delays that are a function of core position but linear along the bending axis with a slope directly proportional to the bending angle. For U-and S-shaped bends (where both ends of the MCF are fixed) the induced refractive index and group delay changes are much smaller than the residual, intrinsic inter-core group delay differences of the unbent MCF. We further show that when used for point-scanning lensless endoscopy with ultrashort pulse excitation, bend-induced group delays in the MCF degrade the point-spread function due to spatiotemporal coupling. Our results show that bend-induced effects in MCFs can be parametrized with only two parameters: the angle of the bend axis and the amplitude of the bend. This remains valid for bend amplitudes up to at least 200 degrees.

Published
2017
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8. External control of dissipative coupling in heterogeneously integrated photonic crystal-SOI waveguide optomechanical system

Author

Rama Raj, Rémy Braive, Alessandro Surrente, Isabelle Robert-Philip, Viktor Tsvirkun, Grégoire Beaudoin, Isabelle Sagnes, Fabrice Raineri, Centre de Nanosciences et de Nanotechnologies [Marcoussis] (C2N), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Charles Coulomb (L2C), and Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
lcsh:Applied optics. Photonics, Waveguide (electromagnetism), Photon, Physics::Optics, quantum dots, 01 natural sciences, Optics, 0103 physical sciences, Radiology, Nuclear Medicine and imaging, 010306 general physics, Instrumentation, Optomechanics, Photonic crystal, 010302 applied physics, Coupling, Physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, lcsh:TA1501-1820, cavity optomechanics, Atomic and Molecular Physics, and Optics, Waveguide optomechanical system, elctromagnetic radiation, mechanical motion, optomechanics, Modulation, Quantum dot, photonic crystals, Dissipative system, Optoelectronics, business
Abstract

International audience; Cavity optomechanical systems with an enhanced coupling between mechanical motion and electromagnetic radiation have permitted the investigation of many novel physical effects. The optomechanical coupling in the majority of these systems is of dispersive nature: the cavity resonance frequency is modulated by the vibrations of the mechanical oscillator. Dissipative optomechanical interaction, where the photon lifetime in the cavity is modulated by the mechanical motion, has recently attracted considerable interest and opens new avenues in optomechanical control and sensing. In this work we demonstrate an external optical control over the dissipative optomechanical coupling strength mediated by the modulation of the absorption of a quantum dot layer in a hybrid optomechanical system. Such control enhances the capability of tailoring the optomechanical coupling of our platform, which can be used in complement to the previously demonstrated control of the relative (dispersive to dissipative) coupling strength via the geometry of the integrated access waveguide.

Published
2016
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9. Ultrathin endoscopes based on multicore fibers and adaptive optics: a status review andperspectives

Author

Géraud Bouwmans, Siddharth Sivankutty, Viktor Tsvirkun, Esben Ravn Andresen, Hervé Rigneault, Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), Université de Lille-Centre National de la Recherche Scientifique (CNRS), MOSAIC (MOSAIC), Institut FRESNEL (FRESNEL), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), and Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Optical fiber, Computer science, Biomedical Engineering, Nanotechnology, 02 engineering and technology, Multicore fiber, 01 natural sciences, law.invention, 010309 optics, Biomaterials, 020210 optoelectronics & photonics, law, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Fiber Optic Technology, Adaptive optics, Multiphoton imaging, ComputingMilieux_MISCELLANEOUS, Endoscopes, Multi-core processor, Optical Imaging, Equipment Design, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic
Abstract

We take stock of the progress that has been made into developing ultrathin endoscopes assisted by wave front shaping. We focus our review on multicore fiber-based lensless endoscopes intended for multiphoton imaging applications. We put the work into perspective by comparing with alternative approaches and by outlining the challenges that lie ahead.

Published
2016
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10. Widefield lensless endoscopy with a multicore fiber

Author

Viktor Tsvirkun, Géraud Bouwmans, Esben Ravn Andresen, Hervé Rigneault, Siddharth Sivankutty, Ori Katz, Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), Université de Lille-Centre National de la Recherche Scientifique (CNRS), MOSAIC (MOSAIC), Institut FRESNEL (FRESNEL), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), and Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Computer science, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, FOS: Physical sciences, 02 engineering and technology, Multicore fiber, 01 natural sciences, 010309 optics, Endoscopic imaging, Optics, 0103 physical sciences, Calibration, medicine, Physics - Biological Physics, ComputingMilieux_MISCELLANEOUS, Wavefront, medicine.diagnostic_test, business.industry, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, Endoscopy, Refresh rate, Aperiodic graph, Biological Physics (physics.bio-ph), [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, 0210 nano-technology, business, Physics - Optics, Optics (physics.optics)
Abstract

We demonstrate pixelation-free real-time widefield endoscopic imaging through an aperiodic multicore fiber (MCF) without any distal opto-mechanical elements or proximal scanners. Exploiting the memory effect in MCFs the images in our system are directly obtained without any post-processing using a static wavefront correction obtained from a single calibration procedure. Our approach allows for video-rate 3D widefield imaging of incoherently illuminated objects with imaging speed not limited by the wavefront shaping device refresh rate., Comment: Published in Optics Letters

Published
2016
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11. Extended field-of-view in a lensless endoscope using an aperiodic multicore fiber

Author

Géraud Bouwmans, Hervé Rigneault, Viktor Tsvirkun, Dani Kogan, Esben Ravn Andresen, Siddharth Sivankutty, Dan Oron, Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), Université de Lille-Centre National de la Recherche Scientifique (CNRS), MOSAIC (MOSAIC), Institut FRESNEL (FRESNEL), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), and Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)

Subjects
Diffraction, FOS: Physical sciences, 02 engineering and technology, Multicore fiber, 01 natural sciences, 010309 optics, Optics, 0103 physical sciences, Extended field of view, skin and connective tissue diseases, ComputingMilieux_MISCELLANEOUS, Wavefront, Physics, business.industry, 021001 nanoscience & nanotechnology, equipment and supplies, Atomic and Molecular Physics, and Optics, Core (optical fiber), Tilt (optics), Aperiodic graph, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, 0210 nano-technology, business, Beam (structure), Physics - Optics, Optics (physics.optics)
Abstract

We investigate lensless endoscopy using coherent beam combining and aperiodic multicore fibers (MCF). We show that diffracted orders, inherent to MCF with periodically arranged cores, dramatically reduce the field of view (FoV) and that randomness in MCF core positions can increase the FoV up to the diffraction limit set by a single fiber core, while maintaining MCF experimental feasibility. We demonstrate experimentally pixelation-free lensless endoscopy imaging over a 120 micron FoV with an aperiodic MCF designed with widely spaced cores. We show that this system is suitable to perform beam scanning imaging by simply applying a tilt to the proximal wavefront., Comment: Submitted to Optics Letters

Published
2016
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12. Integrated III-V Photonic Crystal--Si waveguide platform with tailored optomechanical coupling

Author

Viktor Tsvirkun, Alessandro Surrente, Fabrice Raineri, Grégoire Beaudoin, Rama Raj, Isabelle Sagnes, Isabelle Robert-Philip, and Rémy Braive

Subjects
Physics::Optics, Article
Abstract

Optomechanical systems, in which the vibrations of a mechanical resonator are coupled to an electromagnetic radiation, have permitted the investigation of a wealth of novel physical effects. To fully exploit these phenomena in realistic circuits and to achieve different functionalities on a single chip, the integration of optomechanical resonators is mandatory. Here, we propose a novel approach to heterogeneously integrate arrays of two-dimensional photonic crystal defect cavities on top of silicon-on-insulator waveguides. The optomechanical response of these devices is investigated and evidences an optomechanical coupling involving both dispersive and dissipative mechanisms. By controlling the optical coupling between the waveguide and the photonic crystal, we were able to vary and understand the relative strength of these couplings. This scalable platform allows for an unprecedented control on the optomechanical coupling mechanisms, with a potential benefit in cooling experiments, and for the development of multi-element optomechanical circuits in the framework of optomechanically-driven signal-processing applications.

Published
2015

13. Superharmonic resonances in a two-dimensional non-linear photonic-crystal nano-electro-mechanical oscillator

Author

Rama Raj, Isabelle Robert-Philip, I. Yeo, Rémy Braive, A. Chowdhury, Grégoire Beaudoin, Fabrice Raineri, Viktor Tsvirkun, and Isabelle Sagnes

Subjects
Subharmonic function, Materials science, Physics and Astronomy (miscellaneous), business.industry, Physics::Optics, Resonance, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Molecular physics, Nonlinear system, Membrane, Optics, 0103 physical sciences, Nano, Harmonic, 010306 general physics, 0210 nano-technology, business, Excitation, Photonic crystal
Abstract

We investigate the non-linear mechanical dynamics of a nano-optomechanical mirror formed by a suspended membrane pierced by a photonic crystal. By applying to the mirror a periodic electrostatic force induced by interdigitated electrodes integrated below the membrane, we evidence superharmonic resonances of our nano-electro-mechanical system; the constant phase shift of the oscillator across the resonance tongues is observed on the onset of principal harmonic and subharmonic excitation regimes.

Published
2016
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14. Polarization Properties of Solid-State Organic Lasers

Author

Joseph Zyss, M. Dvorko, I. Gozhyk, Robert Pansu, Melanie Lebental, Clément Lafargue, Sébastien Forget, Christian Ulysse, S. Lozenko, Viktor Tsvirkun, Arnaud Brosseau, Rachel Méallet-Renault, Sébastien Chénais, Jean Frédéric Audibert, Gilles Clavier, Laboratoire de Photonique Quantique et Moléculaire (LPQM), École normale supérieure - Cachan (ENS Cachan)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires (PPSM), École normale supérieure - Cachan (ENS Cachan)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut d'Alembert (IDA), École normale supérieure - Cachan (ENS Cachan)-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Cachan (ENS Cachan), Laboratoire de Physique des Lasers (LPL), Université Paris 13 (UP13)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de photonique et de nanostructures (LPN), Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Théorique et Modèles Statistiques (LPTMS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Photonique Quantique et Moléculaire ( LPQM ), École normale supérieure - Cachan ( ENS Cachan ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires ( PPSM ), École normale supérieure - Cachan ( ENS Cachan ) -Centre National de la Recherche Scientifique ( CNRS ), Institut d'Alembert ( IDA ), Centre National de la Recherche Scientifique ( CNRS ) -École normale supérieure - Cachan ( ENS Cachan ), École normale supérieure - Cachan ( ENS Cachan ), Laboratoire de Physique des Lasers ( LPL ), Université Paris 13 ( UP13 ) -Université Sorbonne Paris Cité ( USPC ) -Institut Galilée-Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de photonique et de nanostructures ( LPN ), Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Physique Théorique et Modèles Statistiques ( LPTMS ), Université Paris-Sud - Paris 11 ( UP11 ) -Centre National de la Recherche Scientifique ( CNRS ), and Pansu, Robert

Subjects
LASING ACTION, Physics::Optics, 02 engineering and technology, 01 natural sciences, OPTICAL MICROCAVITIES, law.invention, WAVE-GUIDE, Resonator, Optics, THIN-FILMS, law, 0103 physical sciences, AMPLIFIERS, 010306 general physics, Anisotropy, Physics, ANISOTROPY, Dye laser, Polarization rotator, Condensed matter physics, business.industry, POLYMER, 021001 nanoscience & nanotechnology, Polarization (waves), Laser, Atomic and Molecular Physics, and Optics, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, [CHIM.THEO] Chemical Sciences/Theoretical and/or physical chemistry, Excited state, [ CHIM.THEO ] Chemical Sciences/Theoretical and/or physical chemistry, MOLECULAR-DISTRIBUTIONS, Degree of polarization, SINGLE-MOLECULES, 0210 nano-technology, business, ENERGY-TRANSFER
Abstract

International audience; The polarization states of lasers are crucial issues both for practical applications and fundamental research. In general, they depend in a combined manner on the properties of the gain material and on the structure of the electromagnetic modes. In this paper, we address this issue in the case of solid-state organic lasers, a technology which enables one to vary independently gain and mode properties. Different kinds of resonators are investigated: in-plane microresonators with Fabry-Perot, square, pentagon, stadium, disk, and kite shapes, and external vertical resonators. The degree of polarization P is measured in each case. It is shown that although transverse electric modes prevail generally (P > 0), the kite-shaped microlaser generates negative values for P (i.e., a flip of the dominant polarization which becomes mostly transverse magnetic polarized). In general, we demonstrate that both the pump polarization and the resonator geometry can be used to tailor the polarization of organic lasers. With this aim in view, we, at last, investigate two other degrees of freedom, namely upon using resonant energy transfer and upon pumping the laser dye to a higher excited state. We then demonstrate that significantly lower P factors can be obtained.

Published
2012

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