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Backscattering suppression in supersonic 1D polariton condensates

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arxiv 1109.5583 v1 pith:AD2YNCO6 submitted 2011-09-26 cond-mat.quant-gas cond-mat.other

Backscattering suppression in supersonic 1D polariton condensates

Dimitrii Tanese , Dmitry Solnyshkov , Alberto Amo , Lydie Ferrier , Emmanuel Bernet-Rolland , Esther Wertz , Isabelle Sagnes , Aristide Lemaitre
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Pascale Senellart Guillaume Malpuech Jacqueline Bloch
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classification cond-mat.quant-gas cond-mat.other
keywords suppressionbackscatteringcondensatecondensatesdisorderpolaritonsupersonicdensity
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We investigate the effects of disorder on the propagation of one-dimensional polariton condensates in semiconductor microcavities. We observe a strong suppression of the backscattering produced by the imperfections of the structure when increasing the condensate density. This suppression occurs in the supersonic regime and is simultaneous to the onset of parametric instabilities which enable the "hopping" of the condensate through the disorder. Our results evidence a new mechanism for the frictionless flow of polaritons at high speeds.

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