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1.
Phys Rev Lett ; 115(8): 089402, 2015 Aug 21.
Article in English | MEDLINE | ID: mdl-26340220
2.
Phys Rev Lett ; 113(10): 103901, 2014 Sep 05.
Article in English | MEDLINE | ID: mdl-25238359

ABSTRACT

We investigate the propagation and scattering of polaritons in a planar GaAs microcavity in the linear regime under resonant excitation. The propagation of the coherent polariton wave across an extended defect creates phase and intensity patterns with identical qualitative features previously attributed to dark and half-dark solitons of polaritons. We demonstrate that these features are observed for negligible nonlinearity (i.e., polariton-polariton interaction) and are, therefore, not sufficient to identify dark and half-dark solitons. A linear model based on the Maxwell equations is shown to reproduce the experimental observations.

3.
Phys Rev Lett ; 109(3): 036404, 2012 Jul 20.
Article in English | MEDLINE | ID: mdl-22861878

ABSTRACT

We report on the experimental observation of the nonlinear analogue of the optical spin Hall effect under highly nonresonant circularly polarized excitation of an exciton-polariton condensate in a GaAs/AlGaAs microcavity. The circularly polarized polariton condensates propagate over macroscopic distances, while the collective condensate spins coherently precess around an effective magnetic field in the sample plane performing up to four complete revolutions.

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