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27 April 2024

» arxiv » 1512.1378

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Polarization dependence of nonlinear wave mixing of spinor polaritons in semiconductor microcavities
Przemyslaw Lewandowski ; Ombline Lafont ; Emmanuel Baudin ; Chris K. P. Chan ; P. T. Leung ; Samuel M. H. Luk ; Elisabeth Galopin ; Aristide Lemaitre ; Jacqueline Bloch ; Jerome Tignon ; Philippe Roussignol ; N. H. Kwong ; Rolf Binder ; Stefan Schumacher ;
Date:	4 Dec 2015
Abstract:	The pseudo-spin dynamics of propagating exciton-polaritons in semiconductor microcavities are known to be strongly influenced by TE-TM splitting. As a vivid consequence, in the Rayleigh scattering regime, the TE-TM splitting gives rise to the optical spin Hall effect (OSHE). Much less is known about its role in the nonlinear optical regime in which four-wave mixing for example allows the formation of spatial patterns in the polariton density, such that hexagons and two-spot patterns are observable in the far field. Here we present a detailed analysis of spin-dependent four-wave mixing processes, by combining the (linear) physics of TE-TM splitting with spin-dependent nonlinear processes, i.e., exciton-exciton interaction and fermionic phase-space filling. Our combined theoretical and experimental study elucidates the complex physics of the four-wave mixing processes that govern polarization and orientation of off-axis modes.
Source:	arXiv, 1512.1378
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