Polarization bistability and resultant spin rings in semiconductor microcavities

D. Sarkar, S. S. Gavrilov, M. Sich, J. H. Quilter, R. A. Bradley, N. A. Gippius, K. Guda, V. D. Kulakovskii, M. S. Skolnick, D. N. Krizhanovskii

Research output: Contribution to journalArticlepeer-review

75 Citations (Scopus)

Abstract

The transmission of a pump laser resonant with the lower polariton branch of a semiconductor microcavity is shown to be highly dependent on the degree of circular polarization of the pump. Spin dependent anisotropy of polariton-polariton interactions allows the internal polarization to be controlled by varying the pump power. The formation of spatial patterns, spin rings with a high degree of circular polarization, arising as a result of polarization bistability, is observed. A phenomenological model based on effective semiclassical equations of motion provides a good description of the experimental results. Inclusion of interactions with the incoherent exciton reservoir, which provides spin-independent blueshifts of the polariton modes, is found to be essential.

Original languageEnglish
Article number216402
JournalPhysical Review Letters
Volume105
Issue number21
DOIs
Publication statusPublished - 15 Nov 2010
Externally publishedYes

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