Publications by Ursula Oesterle

Coherent control of polariton parametric scattering in semiconductor microcavities

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

In a pump-probe experiment, we have been able to control, with phase-locked probe pulses, the ultrafast nonlinear optical emission of a semiconductor microcavity, arising from polariton parametric amplification. This evidences the coherence of the polarito ...

American Physical Society2003

Toward ultrahigh-efficiency aluminum oxide microcavity light- emitting diodes: Guided mode extraction by photonic crystals

Romuald Houdré, Jean-François Carlin, Ursula Oesterle, Henri Benisty

In this paper, we present an improved version of microcavity light-emitting diodes, relying on the use of a low-index material, aluminum oxide. Our work addresses in particular the injection scheme required by the insulating nature of this oxide. The devic ...

2002

High extraction efficiency, laterally injected, light emitting diodes combining microcavities and photonic crystals

Romuald Houdré, Jean-François Carlin, Ursula Oesterle, Henri Benisty

The use of photonic crystals (PCs) for realistic light emitting diodes (LEDs) is discussed, given the constraints of planar semiconductor technology. A viable route for the fabrication of high-efficiency high-brightness electrically injected LEDs is presen ...

2002

Tuning InAs/GaAs quantum dot properties under Stranski-Krastanov growth mode for 1.3 mu m applications

Romuald Houdré, Jean-François Carlin, Marc Ilegems, Ursula Oesterle

In this paper, we present a systematic study of the effect of growth parameters on the structural and optical properties of InAs quantum dot (QD) grown under Stranski-Krastanov mode by molecular beam epitaxy. The dot density is significantly reduced from 1 ...

2002

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

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

Crossover from exciton to biexciton cavity polaritons

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

We report novel oscillator strength transfer phenomena induced by the exciton-exciton correlation. A high quality semiconductor microcavity is resonantly excited by intense circularly polarised sigma(+) pump pulses (100 fs long) and probed at different del ...

2000

Crossover from exciton to biexciton polaritons in semiconductor microcavities

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

Pump-probe measurements in a microcavity containing a quantum well show that a population of circularly polarized (sigma(+)) excitons can completely inhibit the transition to sigma(-) one-exciton states by transferring the oscillator strength to the biexci ...

2000

The importance of disorder in very high quality semiconductor microcavities

Benoît Marie Joseph Deveaud, Ursula Oesterle, Michele Saba

We investigate a semiconductor microcavity containing a quantum well, a sample of exceptional quality. We observe a four-wave mixing response which resembles that of an inhomogeneously broadened exciton system, while the linear transmission measurements ar ...

2000

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