Observation of Half Quantum Vortices in an Exciton-Polariton Condensate (2009)
Lagoudakis, K. G., Ostatnicky, T., Kavokin, A. V., Rubo, Y. G., Andre, R., Deveaud-Pledran, B.
Singly quantized vortices have been already observed in many systems including the superfluid helium, Bose Einstein condensates of dilute atomic gases, and condensates of exciton polaritons in the...
Microcavity exciton-polariton mediated Raman scattering: Experiments and theory (2009)
Bruchhausen, A., Hilario, L. M. Leon, Aligia, A. A., Lobos, A. M., Fainstein, A., Jusserand, B., ...
We studied the intensity of resonant Raman scattering due to optical phonons in a planar II-VI-type semiconductor microcavity in the regime of strong coupling between light and matter. Two different...
Dynamics of long-range order in an exciton-polariton condensate (2009)
Nardin, G., Lagoudakis, K. G., Wouters, M., Richard, M., Baas, A., Andre, R., ...
Long range spatial coherence lies at the heart of the remarkable quantum behaviour of matter manifested by superconductors and superfluids at the macroscopic scale. An intriguing question is how...
Exciton-polariton condensation in a natural two dimensional trap (2009)
Sanvitto, D., Amo, A., Vina, L., Andre, R., Solnyshkov, D., Malpuech, G.
Bose Einstein condensation of exciton-polaritons has recently been reported in homogeneous structures only affected by random in-plane fluctuations. We have taken advantage of the ubiquitous defects...
Krizhanovskii, D. N., Lagoudakis, K. G., Wouters, M., Pietka, B., Bradley, R. A., Guda, K., ...
Real and momentum space spectrally resolved images of microcavity polariton emission in the regime of condensation are investigated under non resonant excitation using a laser source with reduced...
Phase diagram for condensation of microcavity polaritons: from theory to practice (2008)
Marchetti, F. M., Szymanska, M. H., Keeling, J., Kasprzak, J., Andre, R., Littlewood, P. B., ...
The first realization of a polariton condensate was recently achieved in a CdTe microcavity [Kasprzak et al., Nature 443, 409 (2006)]. We compare the experimental phase boundaries, for various...
Control of non-Markovian effects in the dynamics of polaritons in semiconductor microcavities (2008)
Rodriguez, F. J., Quiroga, L., Tejedor, C., Martin, M. D., Vina, L., Andre, R.
We report on time-resolved photoluminescence from semiconductor microcavities showing that an optically controllable mechanism exists to turn on and off memory effects in a polariton system. By...
Quantised Vortices in an Exciton-Polariton Fluid (2008)
Lagoudakis, K. G., Wouters, M., Richard, M., Baas, A., Carusotto, I., Andre, R., ...
One of the most striking quantum effects in a low temperature interacting Bose gas is superfluidity. First observed in liquid 4He, this phenomenon has been intensively studied in a variety of systems...
Baas, A., Lagoudakis, K. G., Richard, M., Andre, R., Dang, Le Si, Deveaud-Pledran, B.
Condensation of exciton-polaritons in semiconductor microcavities takes place despite in plane disorder. Below the critical density the inhomogeneity of the potential seen by the polaritons strongly...
Klopotowski, L., Martin, M. D., Amo, A., Vina, L., Shelykh, I. A., Glazov, M. M., ...
We report a strong experimental evidence of the optical anisotropy in a CdTe-based microcavity: the polarization of light is pinned to one of the crystallographic axes independently on the...
Bose-Einstein condensation of exciton polaritons (2006)
Kasprzak, J., Richard, M., Kundermann, S., Baas, A., Jeambrun, P., Keeling, J. M. J., ...
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...
Experimental evidence for nonequilibrium Bose condensation of exciton polaritons (2005)
Richard, M., Kasprzak, J., Andre, R., Romestein, R., Malpuech, G., ...
We observe dramatic changes in the near-field and far-field emission from a semiconductor microcavity excited by a pulsed and nonresonant optical pump with varying power. Above a threshold pumping...
Muller, A., Bianucci, P., Piermarocchi, C., Fornari, M., Robin, I. C., Andre, R., ...
Tellurium impurity centers in ZnSe were individually probed with time-resolved photoluminescence (PL) spectroscopy. Resolution-limited peaks with an ultra-low spatial density originate in the...
Non-linear coupling of polariton and dark exciton states in semiconductor microcavities (2005)
Shelykh, I.A., Vina, L., Kavokin, A.V., Galkin, N.G., Malpuech, G., Andre, R.
We report a new mechanism of non-linear coupling of optically active and dark crystal states. We observe experimentally pronounced beats of the intensity of photoluminescence from a bottleneck region...
Oscillatory behaviour in the nonlinear emission of semiconductor microcavities (2004)
Vina, L., Andre, R., Ciulin, V., Ganiere, J. D., Deveaud, B.
We have observed marked oscillations in the time-resolved photoluminescence of a semiconductor microcavity under non-resonant excitation conditions. Hot excitons, created with an ultrashort light...
Vilar, A, Araujo, D, De Queiroz, MV, Figueiredo, G, Vaz, L, Andre, R, ...
Budny,R. V., Andre,R., Challis,C. D., Dorland,W., Dux,R., Ernst,D. R., ...
Effect of growth conditions on optical properties of CdSe/ZnSe single quantum dots (2002)
Makino, T., Andre, R., Romestain, R., Dang, Le Si, Bartels, M., ...
In this work, we have investigated the optical properties of two samples of CdSe quantum dots by using submicro-photoluminescence spectroscopy. The effect of vicinal-surface GaAs substrates on their...
Polarization Control of the Non-linear Emission on Semiconductor Microcavities (2002)
Martin, M. D., Aichmayr, G., Vina, L., Andre, R.
The degree of circular polarization ($\wp$) of the non-linear emission in semiconductor microcavities is controlled by changing the exciton-cavity detuning. The polariton relaxation towards...
Microturbulence and flow shear in high-performance JET ITB plasma (2002)
Budny,R. V., Andre,R., Becoulet,A., Challis,C. D., Conway,G. D., Dorland,W., ...
The transport, flow shear, and linear growth rates of microturbulence are studied for a JET plasma with high central q in which an internal transport barrier (ITB) forms and crows to a large radius....
Microturbulence and flow shear in high-performance JET ITB plasma (2002)
Budny, R. V., Andre, R., Becoulet, A., Challis, C. D., Conway, G. D., Dorland, W., ...
The transport, flow shear, and linear growth rates of microturbulence are studied for a JET plasma with high central q in which an internal transport barrier (ITB) forms and crows to a large radius....
Polariton parametric amplification in semiconductor microcavities (2002)
Saba, M., Ciuti, C., Kundermann, S., Staehli, J. L., Deveaud, B., Bloch, J., ...
Modifying the photonic environment of a semiconductor quantum well by embedding it in a high-reflectivity microcavity gives rise to new fundamental optical excitations, half-quantum well excitons,...
Towards a room temperature polariton amplifier (2002)
Saba, M., Ciuti, C., Kundermann, S., Staehli, J. L., Deveaud, B., Bloch, J., ...
We engineer a semiconductor microcavity through an appropriate choice of geometry and materials in order to maximise the exciton-photon coupling. The polaritonic nonlinearities in such devices...
High-temperature ultrafast polariton parametric amplification in semiconductor microcavities (2001)
Saba, M., Ciuti, C., Bloch, J., Thierry-Mieg, V., Andre, R., Dang, L. S., ...
Cavity polaritons, the elementary optical excitations of semiconductor microcavities, may be understood as a superposition of excitons and cavity photons(1). Owing to their composite nature, these...
Coherent exciton-photon dynamics in high-quality II-VI semiconductor microcavities (1998)
Quochi, F., Hayes, G. R., Andre, R., Bongiovanni, G., Mura, A., Staehli, J. L., ...
Results are presented of both linear optical transmission and femtosecond four-wave mixing measurements, on a II-VI semiconductor microcavity into which three quantum wells have been inserted. The...
Optical linewidth and field fluctuations in piezoelectric quantum wells (1995)
Bodin, C, Andre, R, Cibert, J, Le-Si, Dang, Bellet, D, Feuillet, G, ...