Benoît Deveaud

EPFL SB-DO
PH A2 354 (Bâtiment PH)
Station 3
CH-1015 Lausanne

Office: PH A2 354
EPFLSBSB-DECPH-SB

Expertise

Ultrafast properties of quantum wells and semiconductor microstructures, Quantum interactions between light and matter Quantum coherence in solids Bose Einstein condensation of polaritons

Mission

Professeur Honoraire EPFL Directeur Adjoint à l'Enseignement et la Recherche, Ecole Polytechnique Palaiseau
Benoît Deveaud est maintenant Directeur Adjoint à l'Enseignement et la Recherche, Ecole Polytechnique Palaiseau. Benoît Deveaud est né en France en 1952. Il est admis en 1971 à l'Ecole Polytechnique de Paris et s'y spécialise en physique. En 1974, il entre au Centre National d'Etudes des Télécommunications. Il mène à la fois les études sur les centres profonds dans les semi-conducteurs III-V, et poursuit ses études de physique en préparant un diplôme d'études approfondies en physique des solides. En 1984, il soutient sa thèse de doctorat à l'Université de Grenoble. Entre-temps, son équipe s'intéresse aux microstructures et lance une recherche sur les propriétés structurales et optiques des super réseaux à base d'arséniure de gallium. Ces études mettent en évidence par exemple le transport vertical dans les superréseaux ou la quantification des énergies de transition dans un puits quantique. En 1986 il rejoint l'équipe de Daniel Chemla aux Bell Laboratories (Holmdel USA) et participe à la mise au point de la première expérience de luminescence ayant une résolution temporelle meilleure qu'une picoseconde. Il étudie les processus de relaxation ultra-rapide dans les puits quantiques. Rentré en France, au CNET, en 1988, il dirige un laboratoire d'études ultra-rapides, portant sur les propriétés optiques et électroniques des matériaux semi-conducteurs. Nommé professeur en physique à l'EPFL en octobre 1993, son équipe de recherche étudie la physique des processus ultrarapides dans les micro- et nanostructures et les composants qui les utilisent. Il a dirigé l'Institut de Micro et Optoélectronique depuis 1998 puis l'Institut de Photonique et électronique quantique de 2003 à 2007. Son équipe participe activement au Pôle national de Recherche "Quantum Photonics" dont il a été le Directeur Adjoint de 2001 à 2005 puis le Directeur de 2005 à 2013. Il a été Doyen pour la recherche à l'EPFL de 2008 à 2014. De 2014 à 2017, il a dirigé l'Institut de Physique. Il a été editeur divisionnaire de Physical Review Letters de 2001 à 2007.

DIVERS

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Latest News

Hydrodynamic nucleation of quantized vortex pairs in a polariton quantum fluid selected for Nature Physics Cover. Exciton-polariton fluids — which are composed of composite light–matter bosons — provide an experimental means for studying quantum fluids that are intrinsically out of equilibrium. The group of Prof. Benoît Deveaud-Plédran (LOEQ - Laboratory of Quantum Optoelectronics) demonstrate the nucleation and dynamics of vortex–anti-vortex pairs in the flow of exciton-polaritons passing around an obstacle, and establish these systems as a platform for studying quantum turbulence. G. Nardin, Nature Physics 7, 635–641 (2011) Time resolved experimental investigation of spontaneously created vortices. Read publication: Phys. Rev. Lett. 106, 115301 (2011) The experimental investigation of spontaneously created vortices is of utmost importance for the understanding of quantum phase transitions towards a superfluid phase, especially for two-dimensional systems that are expected to be governed by the Berezinski-Kosterlitz-Thouless physics. By means of time-resolved near-field interferometry we track the path of such vortices, created at random locations in an exciton-polariton condensate under pulsed nonresonant excitation, to their final pinning positions imposed by the stationary disorder. We formulate a theoretical model that successfully reproduces the experimental observations. Bose Einstein condensate in the solid state : A team of international collaborators, including EPFL's Laboratory of Quantum Optoelectronics, makes headlines with their research showing that half-matter, half-light quasi-particles called polaritons show compelling evidence of Bose-Einstein condensation in a solid at the relatively high temperature of 19 degrees Kelvin. Their article graces the cover and is featured in the September 28 issue of Nature magazine. Read the full press release... http://actualites.epfl.ch/presseinfo-com?id=378

Prix et distinctions

2019

Publications représentatives

Quantum turbulence in a polariton Fluid

Gael Nardin, Gabriele Grosso, Yoan Leger, Barbara Pietka, Francois Morier-Genoud, Benoit Deveaud-Pledran
Published in Nature Physics, 7, 635 (2011), selected for the cover page in

From single particle to superfluid excitations in a polariton gas

V. Kohnle, Y. Léger, M. Wouters, M. Richard, M.T. Portela-Oberli, B. Deveaud-Plédran
Published in Physical Review Letters, 106, 255302 (2011) in

Coherent Oscillations in an Exciton-Polariton Josephson Junction

K. G. Lagoudakis, B. Pietka, M. Wouters, R. André, B. Deveaud-Plédran
Published in Phys. Rev. Lett., 105, 120403 (2010) in

Multistability of a Coherent Spin Ensemble in a Semiconductor Microcavity

T.K. Paraïso, M. Wouters, Y. Léger, F. Morier-Genoud, and B. Deveaud-Plédran
Published in Nature Materials, 9, 655 (2010) DOI: 10.1038/NMAT2787 in

Observation of Half Quantum Vortices in an Exciton-Polariton Condensate

K. G. Lagoudakis, T. Ostatnick, A.V. Kavokin, Y. G. Rubo, R. André, B. Deveaud-Plédran
Published in Science, 326, 974-976 (2009) in

Dynamics of trion formation in GaAs quantum wells

Portella-Oberli, M.T., Berney, J., Kappei, L., Morier-Genoud, F., Szczytko, J., Deveaud-Plédran, B.,
Published in Phys. Rev. Lett., 102, 096402 (2009) in

Quantized vortices in an exciton-polariton condensate

K.G. Lagoudakis, M. Wouters, M. Richard, A. Baas, I. Carusotto, R. André, LS. Dang, B. Deveaud-Plédran,
Published in Nature Physics, 4, p.706-710 (2008) in

Bose-Einstein condensation of exciton polaritons

J. Kasprzak, M. Richard, S. Kundermann, A. Baas, P. Jeambrun, J. M. J. Keeling, F. M. Marchetti, M. H. Szymanska, R. André, J. L. Staehli, V. Savona, P. B. Littlewood, B. Deveaud and Le Si Dang,
Published in Nature,443, pp.409-414 (2006) in

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

J. Kasprzak, M. Richard, A. Baas, B. Deveaud, R. André, J-Ph. Poizat, Le Si Dang
Published in Phys. Rev. Lett., 100, 067402 (2008) in

Synchronized and desynchronized phases of exciton-polariton condensates in the presence of disorder

A. Baas, K.G. Lagoudakis, M. Richard, R. André. Le Si Dang, B. Deveaud-Plédran
Published in Phys. Rev. Lett., 100, 170401 (2008) in

Polariton quantum boxes in semiconductor microcavities

O. El Daïf, A. Baas, J.-P. Brantut, R. Idrissi Kaitouni, J.L. Staehli, F. Morier-Genoud, B. Deveaud, T. Guillet
Published in Appl. Phys. Lett., 88, 061105 (2006) in

High-temperature ultrafast polariton parametric amplification in semiconductor microcavities

M. Saba, C. Ciuti, J. Bloch, V. Thierry-Mieg, R. André, Le Si Dang,, S. Kundermann, A. Mura, G. Bongiovanni, J. L. Staehli, B. Deveaud,
Published in Nature, 414, 2001 p. 731 (2001), 414, 2001 in

Theory of the angle-resonant polariton amplifier

Ciuti C, Schwendimann P, Deveaud B, A. Quattropani
Published in Phys. Rev., B62, R4825 (2000) in

Coherent Control of Polariton Parametric Scattering in Semiconductor Microcavities

S. Kundermann, M. Saba, C. Ciuti, T. Guillet, U. Oesterle, J. L. Staehli, and B. Deveaud
Published in Phys. Rev. Lett., 80 pp. 107402-107405 (2003), 88, 2003 in

Direct observation of the Mott transition in an optically excited semiconductor quantum well

L. Kappei, J. Szczytko, F. Morier-Genoud, B. Deveaud,
Published in Phys. Rev. Lett., 94 147403 (2005) in

Probing carrier dynamics in nanostructures by picosecond cathodoluminescence

M. Merano, S. Sonderegger, A. Crottini, S. Collin, E. Pelucchi, A. Malko, M.H. Baier, E. Kapon, B. Deveaud, J-D. Ganière
Published in Nature, 438, 479 (2005) in

Strongly Driven Semiconductor Microcavities - From the Polariton Doublet to an AC Stark Triplet

Quochi-F Bongiovanni-G Mura-A Staehli-JL Deveaud-B Stanley-RP Oesterle-U Houdre-R
Published in Phys. Rev Lett., 80, 4733 (1998)., 80, 1998 in

Crossover from exciton to biexciton polaritons in semiconductor microcavities

Saba M, Quochi F, Ciuti C, R.P. Stanley, R. Houdré, U. Oesterle, J.L. Staehli, B. Deveaud, G. Bongiovanni, A. Mura
Published in Phys. Rev. Lett., 85, 385 (2000), 85, 2000 in

Resonant femtosecond emission from quantum well excitons : Rayleigh scattering and luminescence

S. Haacke, R.A. Taylor, R. Zimmermann, I. Bar-Joseph, B. Deveaud
Published in Phys. Rev. Lett., 78, 2228-2231 (1997), 78, 1997 in

Capture of electron and holes in quantum wells

B. Deveaud, J. Shah, T.C: Damen, WT. Tsang
Published in Appl. Phys. Lett. 52 1886 (1988) in

Enhanced radiative decay of free excitons in GaAs quantum wells

B. Deveaud, F. Clérot, N. Roy, K. Satzke, B. Sermage, D.S. Katzer
Published in Phys. Rev. Lett., 67, 2355 (1991), 67, 1991 in

Bloch transport of electrons and holes in superlattice minibands: direct measurement by subpicosecond luminescence spectroscopy.

B. Deveaud, J. Shah, T.C. Damen, B. Lambert, A. Regreny
Published in Phys. Rev. Lett., 58, p2582 (1987) , 58, 1987 in

Observation of carrier localisation in intentionally disordered superlattices

A. Chomette, B. Deveaud, A. Regreny, G. Bastard A. Chomette, B. Deveaud, A. Regreny, G. Bastard
Published in Phys. Rev. Lett.,, 57, p1464, 1986 in