L
L. Legratiet
Researcher at Centre national de la recherche scientifique
Publications - 18
Citations - 311
L. Legratiet is an academic researcher from Centre national de la recherche scientifique. The author has contributed to research in topics: Photonic crystal & Photonics. The author has an hindex of 8, co-authored 16 publications receiving 254 citations.
Papers
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Journal ArticleDOI
Optically controlling the emission chirality of microlasers
Nicola Carlon Zambon,P. St-Jean,M. Milicevic,Aristide Lemaître,A. Harouri,L. Legratiet,O. Bleu,Dmitry Solnyshkov,Guillaume Malpuech,Isabelle Sagnes,Sylvain Ravets,Alberto Amo,Jacqueline Bloch +12 more
TL;DR: In this article, an integrated microlaser where the chirality of the wavefront can be optically controlled is presented. But it is not shown that the scheme that is used, based on an effective spin-orbit coupling of photons in a semiconductor microcavity, can be extended to different laser architectures, thus paving the way to the realization of a new generation of OAM microlasers with tunable chIRality.
Journal ArticleDOI
Highly selective and compact tunable MOEMS photonic crystal Fabry-Perot filter
Salim Boutami,Badhise Ben Bakir,Jean Louis Leclercq,Xavier Letartre,Pedro Rojo-Romeo,Michel Garrigues,Pierre Viktorovitch,Isabelle Sagnes,L. Legratiet,M. Strassner +9 more
TL;DR: A compact and highly selective tunable filter using a Fabry-Perot resonator combining a bottom micromachined 3-pair-InP/air-gap Bragg reflector with a top photonic crystal slab mirror based on the coupling between radiated vertical cavity modes and waveguided modes of the photonic Crystal.
Journal ArticleDOI
Vortex Laser based on III-V semiconductor metasurface: direct generation of coherent Laguerre-Gauss modes carrying controlled orbital angular momentum
Mohamed Seghilani,Mikhael Myara,M. Sellahi,L. Legratiet,Isabelle Sagnes,Grégoire Beaudoin,Philippe Lalanne,Arnaud Garnache +7 more
TL;DR: A surface-emitting laser is demonstrated, based on III-V semiconductor technology with an integrated metasurface, generating vortex-like coherent state in the Laguerre-Gauss basis, using a first order phase perturbation to lift orbital degeneracy of wavefunctions.
Journal ArticleDOI
Small volume excitation and enhancement of dye fluorescence on a 2D photonic crystal surface
Laura C. Estrada,Oscar E. Martínez,Maia Brunstein,Sophie Bouchoule,L. Legratiet,Anne Talneau,Isabelle Sagnes,Paul Monnier,Juan Ariel Levenson,Alejandro M. Yacomotti +9 more
TL;DR: An easy-to-implement scheme for fluorescence enhancement and observation volume reduction using photonic crystals (PhCs) as substrates for microscopy with large enhancement in the excitation in the near field region of the resonant mode.
Journal ArticleDOI
High quality beaming and efficient free-space coupling in L3 photonic crystal active nanocavities
S. Haddadi,L. Legratiet,Isabelle Sagnes,Fabrice Raineri,Alexandre Bazin,Kamel Bencheikh,Juan Ariel Levenson,Alejandro M. Yacomotti +7 more
TL;DR: Far-field measurements of L3 photonic crystal (PhC) cavities with high quality beaming by means of the so-called "band folding" technique, which further validate the "folding" technique on L3 cavities for nanocavity realization with efficient free-space coupling and high Q factors.