Abstract

We reveal the effects of microscopic inhomogeneities and the finite laser spot size on the formation dynamics of polariton condensates in CdTe based microcavities. By studying the temporal evolution of polariton photoluminescence (PL), after non‐resonant pulsed excitation, both in the far‐ and near‐field, we are able to trace the dynamics of different states along the polariton dispersion and to image their spatial profiles. At high pump power, the spatial distribution of the polariton condensate changes depending on the size of the excitation spot. For small laser spot the emission appears localized in real‐space and very flat in k‐space. Using a bigger excitation spot the PL reveals the existence of different emission lines very close in energy and showing independent spatial configuration. This suggests a transition to an Anderson glass phase due to the coupling of the states in different potential wells.

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