Benoît Marie Joseph Deveaud

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Ultrafast tristable spin memory of a coherent polariton gas

Benoît Marie Joseph Deveaud, François Morier-Genoud, Marcia Portella Oberli, Taofiq Paraïso, Roland Cerna

Non-linear interactions in coherent gases are not only at the origin of bright and dark solitons and superfluids; they also give rise to phenomena such as multistability, which hold great promise for the development of advanced photonic and spintronic devi ...

Nature Publishing Group2013

Influence of a nonradiative reservoir on polariton spin multistability

Benoît Marie Joseph Deveaud, François Morier-Genoud, Marcia Portella Oberli, Taofiq Paraïso, Roland Cerna

In this work, we study the influence of the excitation conditions on power-dependent spin switching and spin multistability of exciton polaritons in planar semiconductor microcavities. We obtain experimental evidence for the influence of a reservoir of non ...

American Physical Society2013

Temperature-Dependence of Exciton Radiative Recombination in (Al,Ga)N/GaN Quantum Wells Grown on a-Plane GaN Substrates

Nicolas Grandjean, Benoît Marie Joseph Deveaud, Etienne François Olivier Giraud, Jean-Daniel Ganière, Pierre Michel Corfdir, Mehran Shahmohammadi

This article presents the dynamics of excitons in a-plane (Al,Ga)N/GaN single quantum wells of various thicknesses grown on bulk GaN substrates. For all quantum well samples, recombination is observed to be predominantly radiative in the low-temperature ra ...

Japan Society of Applied Physics2013

Spontaneous self-ordered states of vortex-antivortex pairs in a polariton condensate

Benoît Marie Joseph Deveaud, Vincenzo Savona, Timothy Chi Hin Liew, Konstantinos Lagoudakis, Francesco Manni, Claudéric Ouellet-Plamondon

Polariton condensates have proved to be model systems to investigate topological defects, as they allow for direct and nondestructive imaging of the condensate complex order parameter. The fundamental topological excitations of such systems are quantized v ...

American Physical Society2013

Hyperbolic spin vortices and textures in exciton-polariton condensates

Benoît Marie Joseph Deveaud, Francesco Manni

From cosmology to the microscopic scales of the quantum world, the study of topological excitations is essential for the understanding of phase conformation and phase transitions. Quantum fluids are convenient systems to investigate topological entities be ...

Nature Publishing Group2013

Penrose-Onsager Criterion Validation in a One-Dimensional Polariton Condensate

Benoît Marie Joseph Deveaud, Konstantinos Lagoudakis, Francesco Manni

We perform quantum tomography on one-dimensional polariton condensates, spontaneously occurring in linear disorder valleys in a CdTe planar microcavity sample. By the use of optical interferometric techniques, we determine the first-order coherence functio ...

Amer Physical Soc2012

Dissociation dynamics of singly charged vortices into half-quantum vortex pairs

Benoît Marie Joseph Deveaud, Vincenzo Savona, Timothy Chi Hin Liew, Konstantinos Lagoudakis, Francesco Manni

The quest for identification and understanding of fractional vorticity is a major subject of research in the quantum fluids domain, ranging from superconductors, superfluid Helium-3 to cold atoms. In a two-dimensional Bose degenerate gas with a spin degree ...

Nature Publishing Group2012

Impact of biexcitons on the relaxation mechanisms of polaritons in III-nitride based multiple quantum well microcavities

Nicolas Grandjean, Jean-François Carlin, Benoît Marie Joseph Deveaud, Raphaël Butté, Jacques Levrat, Eric Feltin, Jean-Daniel Ganière, Gabriel Christmann, Pierre Michel Corfdir, Georg Rossbach

We report on the direct observation of biexcitons in a III-nitride based multiple quantum well microcavity operating in the strong light-matter coupling regime by means of nonresonant continuous wave and time-resolved photoluminescence at low temperature. ...

2012

The behaviour of exciton-polaritons

Benoît Marie Joseph Deveaud

Nature Publishing Group2012

On the condensation of polaritons

Benoît Marie Joseph Deveaud

Bose-Einstein condensates (BECs), the "fifth state of matter," have in fact been discovered by chance both in liquid helium and in superconductors. Since these early encounters, BECs have been sought for, both in atom vapors and in solids. Here we report o ...

2012

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