Recherche

Afficher tous les résultats pour

Accueil

Personne

Vincenzo Savona

À propos
Confidentialité
Mentions légales

Graph Chatbot

Publications associées (95)

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

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

Ultralong-range radiative excitation transfer between quantum dots in a planar microcavity

Vincenzo Savona, Gaetano Parascandolo, Guillaume Jean Tarel

We study the system of two quantum dots lying on the central plane of a planar semiconductor microcavity. By solving the full Maxwell problem, we demonstrate that the rate of resonant excitation transfer between the two dots decays as d(-12) as a function ...

2008

Effect of interface disorder on quantum well excitons and microcavity polaritons

Vincenzo Savona

The theory of the linear optical response of excitons in quantum wells and polaritons in planar semiconductor microcavities is reviewed, in the light of the existing experiments. For quantum well excitons, it is shown that disorder mainly affects the excit ...

2007

Long-range order in the Bose-Einstein condensation of polaritons

Vincenzo Savona, Davide Sarchi

We adopt a kinetic theory of polariton nonequilibrium 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 situatio ...

2007

Towards thermal equilibrium in the Bose-Einstein condensation of microcavity polaritons

Vincenzo Savona, Davide Sarchi

By comparing a kinetic and a thermal-equilibrium theory of polariton Bose-Einstein condensation, we study under what conditions the dynamical condensation under steady-state non-resonant pumping can approach thermal equilibrium. In particular, we study the ...

2007

Engineering the spatial confinement of exciton polaritons in semiconductors

Vincenzo Savona, Benoît Marie Joseph Deveaud, Jean-Daniel Ganière, François Morier-Genoud, Reda Idrissi Kaitouni, Taofiq Paraïso, Ounsi El Daïf, Pierre Lugan

We demonstrate three-dimensional spatial confinement of exciton-polaritons in a semiconductor microcavity. Polaritons are confined within a micron-sized region of slightly larger cavity thickness, called mesa, through lateral trapping of their photon compo ...

2006

Realistic heterointerface model for excitonic states in growth-interrupted GaAs quantum wells

Vincenzo Savona

We present a model for the disorder of the heterointerfaces in GaAs quantum wells including long-range components like monolayer island formation induced by the surface diffusion during the epitaxial growth process. Taking into account both interfaces, a d ...

2006

Bose-Einstein condensation of exciton polaritons

Vincenzo Savona, Benoît Marie Joseph Deveaud, Stefan Kundermann

Phase transitions to quantum condensed phases - such as Bose - Einstein condensation (BEC), superfluidity, and superconductivity - have long fascinated scientists, as they bring pure quantum effects to a macroscopic scale. BEC has, for example, famously be ...

2006

Zero dimensional exciton-polaritons

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

We present a novel semiconductor structure in which 0D polaritons coexist with 2D microcavity polaritons. Spatial trapping of the 2D microcavity polaritons results from the confinement of their photonic part in a potential well, consisting of an adjustable ...

2006

Quantum complementarity of microcavity polaritons

Vincenzo Savona

We present an experiment that probes polariton quantum correlations by exploiting quantum complementarity. Specifically, we find that polaritons in two distinct idler modes interfere if and only if they share the same signal mode so that "which-way" inform ...

2005

Onset of coherent photoluminescence in semiconductor microcavities

Vincenzo Savona, Paolo Schwendimann

The nonlinear dynamics of exciton-polaritons in semiconductor microcavities is treated within a model of interacting bosons for the signal, pump, and idler modes. The correlations between all three polariton modes are taken into account in the lowest order ...

2005

Localization-dependent photoluminescence spectrum of biexcitons in semiconductor quantum wires

Vincenzo Savona, Benoît Marie Joseph Deveaud, Andrea Feltrin, Xiao Wang

We study exciton and biexciton spectra in disordered semiconductor quantum wires by means of nanophotoluminescence spectroscopy. We demonstrate a close link between the exciton localization length along the wire and the occurrence of a biexciton spectral l ...

2005

Long-range radiative interaction between semiconductor quantum dots

Vincenzo Savona, Gaetano Parascandolo

We develop a Maxwell-Schrodinger formalism in order to describe the radiative interaction mechanism between semiconductor quantum dots. We solve the Maxwell equations for the electromagnetic field coupled to the polarization field of a quantum dot ensemble ...

2005

Optical properties of quantum well polaritons in microcavities

Vincenzo Savona

EPFL1997

Page 5 sur 5