Personne

Davide Sarchi

Cette personne n’est plus à l’EPFL

Publications associées (15)

Stationary and time-dependent correlations in polariton condensates

Paolo Schwendimann, Antonio Quattropani, Davide Sarchi

The statistics of the condensed polaritons is described in terms of the Wigner function. In the framework of the truncated Wigner method, the Wigner function obeys a Fokker-Planck equation, which is solved analytically. The second-order correlations in the ...

2010

Enhancement of microcavity polariton relaxation under confinement

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

Coherent optical control of the wave function of zero dimensional exciton polaritons

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

Control of the wave function of confined microcavity polaritons is demonstrated experimentally and theoretically by means of tailored resonant optical excitation. Three dimensional confinement is achieved by etching mesas on top of the microcavity spacer l ...

2009

Polariton parametric photoluminescence in spatially inhomogeneous systems

Vincenzo Savona, Davide Sarchi

A general theory of polariton parametric photoluminescence in spatially inhomogeneous systems is developed. The quantum Langevin equations are solved in a generalized Bogoliubov-de Gennes approximation. We apply the formalism to the specific case of a diso ...

2009

Thermodynamics and linear response of a Bose-Einstein condensate of microcavity polaritons

Vincenzo Savona, Davide Sarchi

In this work we derive a theory of polariton condensation based on the theory of interacting Bose particles. In particular, we describe self-consistently the linear exciton-photon coupling and the exciton-nonlinearities, by generalizing the Hartree-Fock-Po ...

V C H PUBLISHERS, SUITE 909, 220 E 23RD ST, NEW YORK, NY 10010 USA2008

Kinetics of the Bose-Einstein condensation of microcavity polaritons - art. no. 689213

Vincenzo Savona, Davide Sarchi

We adopt a kinetic theory of polariton non-equilibrium Bose-Einstein condensation, to describe the formation of off-diagonal long-range order. The theory accounts properly for the dominant role of quantum fluctuations in the condensate. In realistic situat ...

SPIE-INT SOC OPTICAL ENGINEERING, PO BOX 10, BELLINGHAM, WA 98227-0010 USA2008

Coherent dynamics and parametric instabilities of microcavity polaritons in double-well systems

Vincenzo Savona, Davide Sarchi

We investigate the physics of coherent polaritons in a double-well configuration under a resonant pumping. For a continuous-wave pump, bistability and self-pulsing regimes are identified as a function of the pump energy and intensity. The response to an ad ...

2008

Spectrum and thermal fluctuations of a microcavity polariton Bose-Einstein condensate

Vincenzo Savona, Davide Sarchi

The Hartree-Fock-Popov theory of interacting Bose particles is developed, for modeling exciton-polaritons in semiconductor microcavities undergoing Bose-Einstein condensation. A self-consistent treatment of the linear exciton-photon coupling and of the exc ...

2008

Effects of noise in different approaches for the statistics of polariton condensates

Paolo Schwendimann, Antonio Quattropani, Davide Sarchi

The second-order correlation function of the polariton condensate is calculated within two different approaches. Both approaches qualitatively reproduce the deviations from the full coherence of the second-order correlation function that have been observed ...

2008

Bose-Einstein condensation of microcavity polaritons

Davide Sarchi

This thesis presents a theoretical description of the phase transition, with formation of long-range spatial coherence, occurring in a gas of exciton-polaritons in a semiconductor microcavity structure. The results and predictions of the theories developed ...

EPFL2007

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