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arXiv · 1007.3575

Spin rings in bi-stable planar semiconductor microcavities

C. Adrados·A. Amo·T. C. H. Liew·R. Hivet·R. Houdre·E. Giacobino·A. V. Kavokin·A. Bramati
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Abstract

A unique feature of exciton-polaritons, inherited from their mixed light-matter origin, is the strongly spin-dependent polariton-polariton interaction, which has been predicted to result in the formation of spin rings in real space [Shelykh et al., Phys. Rev. Lett. 100, 116401 (2008)]. Here we experimentally demonstrate the spin bi-stability of exciton-polaritons in an InGaAs-based semiconductor microcavity under resonant optical pumping. We observe the formation of spin rings whose size can be finely controlled in a spatial scale down to the micrometer range, much smaller than the spot size. We additionally evaluate the sign and magnitude of the antiparallel polariton spin interaction constant.

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C. Adrados, A. Amo, T. C. H. Liew, R. Hivet, R. Houdre, E. Giacobino, A. V. Kavokin, A. Bramati. 2010-07-21. Spin rings in bi-stable planar semiconductor microcavities. https://doi.org/10.1103/physrevlett.105.216403

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