Optical switching of polariton density patterns in a semiconductor microcavity
Optical switching of polariton density patterns in a semiconductor microcavity
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DOI：
10.1088/1402-4896/aa58f6
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发表时间：
2017-02
期刊：
影响因子：
2.9
通讯作者：
N. Kwong;C. Tsang;S. Luk;Y. Tse;Ch. K. P. Chan;P. Lewandowski;P. Leung;S. Schumacher;R. Binder
中科院分区：
文献类型：
--
作者：
N. Kwong;C. Tsang;S. Luk;Y. Tse;Ch. K. P. Chan;P. Lewandowski;P. Leung;S. Schumacher;R. Binder
相位共轭散射可以在泵浦半导体量子阱微腔中产生的激子-极化激元流体中触发调制不稳定性。这些不稳定性可以形成密度图案，例如六边形和条纹，其在所发射的光中产生对应的图案。可以通过相对弱的控制光束来切换密度图案。本文综述了在我们的理论理解的物理过程，调节各种模式之间的竞争和驱动光开关的进展。使用极化激元动力学的微观模型的模式切换的模拟结果示出，和竞争和开关的机制进行了分析，使用减少的模型，限制极化激元运动的有限数量的相关模式。我们还简要地指出了极化激元动力学的自旋依赖性对图案的影响。
Phase-conjugate scattering can trigger modulational instabilities in a fluid of exciton-polaritons created in a pumped semiconductor quantum-well microcavity. These instabilities can settle into density patterns, e.g. hexagons and stripes, which produce corresponding patterns in the emitted light. The density patterns can be switched by relatively weak control optical beams. This paper reviews progress in our theoretical understanding of the physical processes that regulate the competitions among various patterns and drive the optical switching. Simulation results of pattern switching using a microscopic model of polariton dynamics are shown, and the mechanisms underlying competitions and switching are analyzed using reduced models that restrict the polariton motions to a limited number of relevant modes. We also briefly indicate the effects of the spin dependence of the polariton dynamics on the patterns.