Publications associées à Quantum network

Direct observation of an ac Stark splitting in semiconductor microcavities excited above the continuum onset

Romuald Houdré, Benoît Marie Joseph Deveaud, Ursula Oesterle, Cristiano Ciuti, Michele Saba

We study the coherent optical response of a very high-finesse microcavity with a single quantum well by means of degenerate subpicosecond pump-probe spectroscopy. The dynamics of the ac Stark effect versus Pump intensity is investigated upon tuning the emp ...

2000

Is light absorption by excitons in quantum wells an intrinsic process?

Benoît Marie Joseph Deveaud, Ursula Oesterle, Cristiano Ciuti

A novel method of controlling light absorption by exciton-polaritons is presented. The coherent light-induced coupling of excitons in multiple quantum well Bragg structures is exploited to sup press dramatically the absorption. Our results show that excito ...

2000

Optical signatures of energy-level statistics in a disordered quantum system

Benoît Marie Joseph Deveaud, Vincenzo Savona

Time-resolved measurements of the resonant Rayleigh scattering from quantum well excitons are shown to provide information on the energy-level statistics of the localized exciton states. The signal transients are reproduced by a microscopic quantum model o ...

2000

Resonant Rayleigh scattering on quantum well excitons: Theory and experiment

Benoît Marie Joseph Deveaud, Vincenzo Savona

Time-resolved up-conversion measurements of secondary emission from multiple quantum wells under resonant femtosecond excitation are reported for GaAs multiple quantum wells with qualitatively different interface disorder. The transient resonant Rayleigh s ...

2000

The microcavity AC Stark triplet: Excitation in the exciton continuum

Benoît Marie Joseph Deveaud, Ursula Oesterle, Cristiano Ciuti, Michele Saba

The coherent optical response of high quality microcavities containing quantum wells is investigated. The dynamics of the ac Stark effect is investigated by degenerate pump-probe experiments, by exciting the quantum well excitons at various intensities and ...

2000

Radiative lifetime of negative trions in GaAs and CdTe quantum wells

Benoît Marie Joseph Deveaud, Jean-Daniel Ganière, Victoria Ciulin

We have studied experimentally the radiative lifetimes of negatively charged excitons (X-) and neutral excitons (X) in GaAs and CdTe quantum wells. Despite the different optical properties (e.g. trion binding energies) and the different quantum well struct ...

2000

Excitonic Bloch equations for a two-dimensional system of interacting excitons

Vincenzo Savona, Paolo Schwendimann, Cristiano Ciuti, Gil Rochat

We derive the effective Bose Hamiltonian for a system of interacting excitons applying the Usui transformation. The fermionic nonlinearities are consistently included, leading to a density dependent correction to the kinetic Hamiltonian and to a saturation ...

2000

Direct observation of new transitions in the absorption spectra of a V-groove quantum wire waveguide

Elyahou Kapon, Alok Rudra, Marc-André Dupertuis, Daniel Oberli, Klaus Leifer

We report on the direct absorption measurement of the polarization selection rules in a V-groove QWR waveguide. Attenuation measurements in a 1 mm long waveguide were performed from 10 K up to room temperature. These measurements yielded the QWR DOS select ...

2000

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Quantum network

Dual contribution to the Stokes shift in InGaN-GaN quantum wells

Direct observation of an ac Stark splitting in semiconductor microcavities excited above the continuum onset

Is light absorption by excitons in quantum wells an intrinsic process?

Optical signatures of energy-level statistics in a disordered quantum system

Resonant Rayleigh scattering on quantum well excitons: Theory and experiment

The microcavity AC Stark triplet: Excitation in the exciton continuum

Time-resolved spectroscopy of MBE-grown nitride based heterostructures

Radiative lifetime of negative trions in GaAs and CdTe quantum wells

Excitonic Bloch equations for a two-dimensional system of interacting excitons

Direct observation of new transitions in the absorption spectra of a V-groove quantum wire waveguide

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Chattez avec Graph Search

Dual contribution to the Stokes shift in InGaN-GaN quantum wells

Is light absorption by excitons in quantum wells an intrinsic process?

Direct observation of an ac Stark splitting in semiconductor microcavities excited above the continuum onset

Optical signatures of energy-level statistics in a disordered quantum system

Direct observation of new transitions in the absorption spectra of a V-groove quantum wire waveguide

The microcavity AC Stark triplet: Excitation in the exciton continuum

Radiative lifetime of negative trions in GaAs and CdTe quantum wells

Excitonic Bloch equations for a two-dimensional system of interacting excitons

Time-resolved spectroscopy of MBE-grown nitride based heterostructures

Resonant Rayleigh scattering on quantum well excitons: Theory and experiment