François Morier-Genoud

Cette personne a quitté l’EPFL

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Publications associées (32)

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Three-Dimensional Multiple-Order Twinning of Self-Catalyzed GaAs Nanowires on Si Substrates

Anna Fontcuberta i Morral, François Morier-Genoud, Eleonora Russo, Martin Heiss, Emanuele Uccelli

In this paper we introduce a new paradigm for nanowire growth that explains the unwanted appearance of parasitic nonvertical nanowires. With a crystal structure polarization analysis of the initial stages of GaAs nanowire growth on Si substrates, we demons ...

American Chemical Society2011

Near infrared twin photon source

Benoît Marie Joseph Deveaud, François Morier-Genoud, Ounsi El Daïf

Optical parametric oscillator including a semiconductor microcavity being configured to spatially localize polaritons of at least three quantized polariton energy levels to effect an optical parametric oscillation. ...

2006

Spin-to-orbital angular momentum conversion in semiconductor microcavities

Benoît Marie Joseph Deveaud, François Morier-Genoud, Timothy Chi Hin Liew, Taofiq Paraïso, Konstantinos Lagoudakis, Roland Cerna, Francesco Manni

We experimentally demonstrate a technique for the generation of optical beams carrying orbital angular momentum using a planar semiconductor microcavity. Despite being isotropic systems with no structural gyrotropy, semiconductor microcavities, because of ...

2011

Dynamics of trion formation in GaAs quantum wells

Benoît Marie Joseph Deveaud, François Morier-Genoud, Marcia Portella Oberli, Jean Berney, Lars Kappei

We show a double path mechanism for the formation of charged excitons (trions); they are formed through bi- and trimolecular processes. This directly implies that both negatively and positively charged excitons coexist in a quantum well, even in the absenc ...

2009

Magnetic Field Induced Redistribution of Exciton-Polariton Density on Confined Modes

Benoît Marie Joseph Deveaud, François Morier-Genoud, Gaël Nardin, Barbara Pietka

The influence of magnetic field on confined exciton-polariton modes inside a semiconductor microcavity is discussed. The three-dimensional confinement for exciton-polaritons is achieved by the mesa structures confining the photonic part of polaritons. We o ...

Polish Acad Sciences Inst Physics2012

Probability density optical tomography of confined quasiparticles in a semiconductor microcavity

Benoît Marie Joseph Deveaud, François Morier-Genoud, Gaël Nardin, Ounsi El Daïf, Taofiq Paraïso, Barbara Pietka, Roland Cerna

We present the optical tomography of the probability density of quasiparticles, the microcavity polaritons, confined in three dimensions by cylindrical traps. Collecting the photoluminescence emitted by the quasimodes under continuous nonresonant laser exc ...

AIP American Institute of Physics2009

Stochastic Resonance in Collective Exciton-Polariton Excitations inside a GaAs Microcavity

Benoît Marie Joseph Deveaud, François Morier-Genoud, Marcia Portella Oberli, Stéphane Trebaol, Hadis Abbaspour

We report the first observation of stochastic resonance in confined exciton polaritons. We evidence this phenomena by tracking the polaritons behavior through two stochastic resonance quantifiers namely the spectral magnification factor and the signal-to-n ...

American Physical Society2014

Reservoir-induced decoherence of resonantly excited confined polaritons

Benoît Marie Joseph Deveaud, Daniel Oberli, François Morier-Genoud, Marcia Portella Oberli, Claudéric Ouellet-Plamondon, Grégory Chilpéric Sallen

We report on the effect of decoherence on polariton bistability. The polariton hysteresis loop is shown to collapse in a similar way when increasing the temperature or under nonresonant excitation power. The hysteresis upward threshold is pulled to lower e ...

Amer Physical Soc2017

Polariton based all-optical spin device

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

An all-optical spin device is based on spin multistability of trapped microactivity polaritons. ...

2013

Microcavity for optical telecommunication device, comprises two bragg reflectors separated by at least one semiconductor layer

Benoît Marie Joseph Deveaud, François Morier-Genoud, Cristiano Ciuti

Microcavity comprising two reflectors, at least one semiconductor layer separating said reflectors and a semiconductor quantum well wherein at least one of said reflectors and of said at least one semiconductor layer comprises a structure which is adjusted ...

2006

Resonant nonlinear studies of trapped 0D-microcavity polaritons

Benoît Marie Joseph Deveaud, François Morier-Genoud, Gaël Nardin, Ounsi El Daïf, Taofiq Paraïso

We performed studies on microcavity polaritons trapped along the three dimensions of space, under resonant excitation on a confined lower polariton state. We observed various nonlinear behaviors as a function of the pump power, without any apparent loss of ...

WILEY-VCH Verlag2008

Polariton quantum boxes in semiconductor microcavities

Benoît Marie Joseph Deveaud, François Morier-Genoud, Jean-Philippe Brantut, Ounsi El Daïf, Reda Idrissi Kaitouni

American Institute of Physics2006