Collective fluid dynamics of a polariton condensate in a semiconductor microcavity

A. Amo, D. Sanvitto (), F. P. Laussy, D. Ballarini, E. del Valle, M. D. Martin, A. Lemaître, J. Bloch, D. N. Krizhanovskii, M. S. Skolnick, C. Tejedor and L. Viña
Additional contact information
A. Amo: Departamento Física de Materiales,
D. Sanvitto: Departamento Física de Materiales,
F. P. Laussy: Universidad Autonóma de Madrid, 28049 Madrid, Spain
D. Ballarini: Departamento Física de Materiales,
E. del Valle: Universidad Autonóma de Madrid, 28049 Madrid, Spain
M. D. Martin: Departamento Física de Materiales,
A. Lemaître: LPN/CNRS, Route de Nozay, 91460 Marcoussis, France
J. Bloch: LPN/CNRS, Route de Nozay, 91460 Marcoussis, France
D. N. Krizhanovskii: University of Sheffield
M. S. Skolnick: University of Sheffield
C. Tejedor: Universidad Autonóma de Madrid, 28049 Madrid, Spain
L. Viña: Departamento Física de Materiales,

Nature, 2009, vol. 457, issue 7227, 291-295

Abstract: Polariton condensates It has been predicted that excitons, bound pairs of electrons and holes, should form Bose–Einstein-like condensates at relatively high temperatures. Recently, evidence has been reported of a BEC in a semiconductor microcavity formed by exciton-polaritons, which are a mixture of excitons and photons. Superfluid-like behaviour is expected in such polariton condensates, though it would be of an unusual character as microcavity polaritons are short-lived, so the condensates are not in thermal equilibrium. Amo et al. have developed a pulsed optical excitation technique to set a microcavity polariton condensate in motion and they observe clear manifestations of collective dynamics with superfluid characteristics, such as flow without resistance when crossing a defect. This work points into a new direction to study the dynamics of out-of-equilibrium condensates.

Date: 2009
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DOI: 10.1038/nature07640

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