Abstract

We report an analysis of polariton scattering in semiconductor microcavity (MC) under a strong cw resonant excitation. We show that near the threshold of the parametric scattering accounting for the pump induced blue shift results in an qualitative modification of scattering scenario. Namely the maximumof the scattered signal above the threshold of stimulated parametric scattering does not shift along the microcavity lower polariton branch with the change of pump detuning or angle of incidence but is fixed at normal direction. We show that such a behavior can be modelled numerically by a system of Maxwell and nonlinear Schrodinger equations for cavity polaritons and explained via the competition between the bistability of a driven nonlinear MC polariton and the instabilities of parametric polariton-polariton scattering. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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