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

Результат исследований: Вклад в журналСтатьярецензирование

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Аннотация

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.

Язык оригиналаАнглийский
Номер статьи216402
ЖурналPhysical Review Letters
Том105
Номер выпуска21
DOI
СостояниеОпубликовано - 15 нояб. 2010
Опубликовано для внешнего пользованияДа

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