Orbital angular momentum bistability in a microlaser
| Autor: | Isabelle Sagnes, Jacqueline Bloch, P. St-Jean, L. Le Gratiet, Aristide Lemaître, N. Carlon Zambon, Alberto Amo, Sylvain Ravets, A. Harouri |
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| Přispěvatelé: | Centre de Nanosciences et Nanotechnologies (C2N (UMR_9001)), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de photonique et de nanostructures (LPN), 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), ANR-16-CE30-0021,QFL,Fluides Quantiques de Lumière(2016) |
| Rok vydání: | 2018 |
| Předmět: |
Angular momentum
Active laser medium Bistability Physics::Optics FOS: Physical sciences 02 engineering and technology 7. Clean energy 01 natural sciences Optical switch 010309 optics Optics [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph] 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Spontaneous emission ComputingMilieux_MISCELLANEOUS Circular polarization Physics [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] Condensed Matter - Mesoscale and Nanoscale Physics business.industry 021001 nanoscience & nanotechnology Polarization (waves) Atomic and Molecular Physics and Optics Quantum electrodynamics 0210 nano-technology business Ultrashort pulse Physics - Optics Optics (physics.optics) |
| Zdroj: | Optics Letters Optics Letters, 2019, 44 (18), pp.4531. ⟨10.1364/OL.44.004531⟩ Optics Letters, Optical Society of America, 2019, 44 (18), pp.4531. ⟨10.1364/OL.44.004531⟩ Optics Letters, Optical Society of America-OSA Publishing, 2019, 44 (18), pp.4531. ⟨10.1364/OL.44.004531⟩ |
| ISSN: | 0146-9592 1539-4794 |
| DOI: | 10.48550/arxiv.1812.06163 |
| Popis: | Light's orbital angular momentum (OAM) is an unbounded degree of freedom emerging in helical beams that appears very advantageous technologically. Using a chiral microlaser, i.e. an integrated device that allows generating an emission carrying a net OAM, we demonstrate a regime of bistability involving two modes presenting distinct OAM (L = 0 and L = 2). Furthermore, thanks to an engineered spin-orbit coupling of light in the device, these modes also exhibit distinct polarization patterns, i.e. cirular and azimuthal polarizations. Using a dynamical model of rate euqations, we show that this bistability arises from polarization-dependent saturation of the gain medium. Such a bistable regime appears very promising for implementing ultrafast optical switches based on the OAM of light. As well, it paves the way to the exploration of dynamical processes involving phase and polarization vortices. |
| Databáze: | OpenAIRE |
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