Quantum fluid effects and parametric instabilities in microcavities

Details Quantum fluid effects and parametric instabilities in microcavities Quantum fluid effects and parametric instabilities in microcavities

2005-02-24

arxiv.org/abs/cond-mat/0502585v1

Physica Status Solidi B 242 (2005) 2224-2245

Physics

Condensed Matter

Other Condensed Matter

25 figures, 16 pages long

Scientific paper

10.1002/pssb.200560961

We present a description of the non-equilibrium properties of a microcavity polariton fluid, injected by a nearly-resonant continuous wave pump laser. In the first part, we point out the interplay between the peculiar dispersion of the Bogolubov-like polariton excitations and the onset of polariton parametric instabilities. We show how collective excitation spectra having no counterpart in equilibrium systems can be observed by tuning the excitation angle and frequency. In the second part, we explain the impact of these collective excitations on the in-plane propagation of the polariton fluid. We show that the resonant Rayleigh scattering induced by artificial or natural defects is a very sensitive tool to show fascinating effects such as polariton superfluidity or polariton Cherenkov effect. We present a comprehensive set of predicted far-field and near-field images for the resonant Rayleigh scattering emission.

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