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arxiv: 0907.3424 · v1 · pith:VDTNAUPFnew · submitted 2009-07-20 · ❄️ cond-mat.other

Spontaneous non-ground state polariton condensation in pillar microcavities

M. Maragkou , A. J. D. Grundy , E. Wertz , A. Lemaitre , I. Sagnes , P. Senellart , J. Bloch , P. G. Lagoudakis This is my paper
classification ❄️ cond-mat.other
keywords polaritonstatecondensationnon-groundmicrocavitiesmodepillarscattering
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We observe spontaneously driven non-ground state polariton condensation in GaAs pillar microcavities under non-resonant optical excitation. We identify a regime where the interplay of exciton-exciton and pair polariton scattering can lead to mode switching from non-ground state to ground state polariton condensation. A simple kinematic model satisfactorily describes the observed mode switching as each of the above scattering mechanisms becomes prevalent at different carrier densities.

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