Benoît Marie Joseph Deveaud

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Related publications (95)

Exciton localization on basal stacking faults in a-plane epitaxial lateral overgrown GaN grown by hydride vapor phase epitaxy

Nicolas Grandjean, Benoît Marie Joseph Deveaud, Jacques Levrat, Jean-Daniel Ganière, Denis Martin, Pierre Michel Corfdir, Tiankai Zhu, Jelena Ristic

We present a detailed study of the luminescence at 3.42 eV usually observed in a-plane epitaxial lateral overgrowth (ELO) GaN grown by hydride vapor phase epitaxy on r-plane sapphire. This band is related to radiative recombination of excitons in a commonl ...

American Institute of Physics2009

Time-resolved spectroscopy on GaN nanocolumns grown by plasma assisted molecular beam epitaxy on Si substrates

Benoît Marie Joseph Deveaud, Jean-Daniel Ganière, Pierre Michel Corfdir, Jelena Ristic

A detailed study of excitons in unstrained GaN nanocolumns grown by plasma assisted molecular beam epitaxy on silicon substrates is presented. The time-integrated and time-resolved photoluminescence spectra do not depend significantly on the (111) or (001) ...

American Institute of Physics2009

Enhancement of microcavity polariton relaxation under confinement

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

We experimentally investigate the relaxation of spatially confined microcavity polaritons. We measure the time- and energy-resolved photoluminescence under resonant excitation and in the low-density regime. In this way, we have access to the time evolution ...

2009

Nonlinear relaxation of zero-dimension-trapped microcavity polaritons

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

We study the emission properties of confined polariton states in shallow zero-dimensional traps under nonresonant excitation. We evidence several relaxation regimes. For slightly negative photon-exciton detuning, we observe a nonlinear increase of the emis ...

AIP American Institute of Physics2008

Second-order time correlations within a polariton Bose-Einstein condensate in a CdTe microcavity

Benoît Marie Joseph Deveaud

Second-order time correlations of polaritons have been measured across the condensation threshold in a CdTe microcavity. The onset of Bose-Einstein condensation is marked by the disappearance of photon bunching, demonstrating the transition from a thermal- ...

American Physical Society2008

Modeling of gain and phase dynamics in quantum dot amplifiers

Benoît Marie Joseph Deveaud, Marco Rossetti, Pablo Moreno

By means of an electron hole rate equation model we explain the phase dynamics of a quantum dot semiconductor optical amplifier and the appearance of different decay times observed in pump and probe experiments. The ultrafast hole relaxation leads to a fir ...

Springer US2008

Quantized Vortices in an Exciton-Polariton Condensate

Benoît Marie Joseph Deveaud, Konstantinos Lagoudakis

One of the most striking quantum effects in an interacting Bose gas at low temperature is superfluidity. First observed in liquid 4He, this phenomenon has been intensively studied in a variety of systems for its remarkable features such as the persistence ...

Nature Publishing Group2008

Dressed excitons within an incoherent electron gas: Observation of a Mollow triplet and an Autler-Townes doublet

Benoît Marie Joseph Deveaud, Marcia Portella Oberli, Jean Berney

We demonstrate that the interaction between excitons and a sea of incoherent electrons does not preclude excitons dressing by light. We investigate if exciton-electron scattering plays some inhibiting role in the coherent light-exciton coupling by measurin ...

2008

Intraband carrier photoexcitation in quantum dot lasers

Benoît Marie Joseph Deveaud, Marcia Portella Oberli

We unveil the role of bound-to-continuum photoexcitation of carriers as a relevant process that affects the performance of quantum dot (OD) lasers. We present the response of an InAs/InGaAs QD laser to a sub-band gap pump, showing an unexpected depletion o ...

American Chemical Society2008

Resonant nonlinear studies of trapped 0D-microcavity polaritons

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

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

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Exciton localization on basal stacking faults in a-plane epitaxial lateral overgrown GaN grown by hydride vapor phase epitaxy

Nicolas Grandjean, Benoît Marie Joseph Deveaud, Jacques Levrat, Jean-Daniel Ganière, Denis Martin, Pierre Michel Corfdir, Tiankai Zhu, Jelena Ristic

American Institute of Physics2009