Polariton ring condensates and sunflower ripples in an expanding quantum liquid

Details Polariton ring condensates and sunflower ripples in an expanding quantum liquid Polariton ring condensates and sunflower ripples in an expanding quantum liquid

2012-01-10

arxiv.org/abs/1201.2114v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

Optically pumping high quality semiconductor microcavities allows for the spontaneous formation of polariton condensates, which can propagate over distances of many microns. Tightly focussed pump spots here are found to produce expanding incoherent bottleneck polaritons which coherently amplify the ballistic polaritons and lead to the formation of unusual ring condensates. This quantum liquid is found to form a remarkable sunflower-like spatial ripple pattern which arises from self interference with Rayleigh-scattered coherent polariton waves in the Cerenkov regime.

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