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Non-linear coupling of polariton and dark exciton states in semiconductor microcavities

机译:半导体微腔中极化子和暗激子态的非线性耦合

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摘要

We report a new mechanism of non-linear coupling of optically active and dark crystal states. We observe experimentally pronounced beats of the intensity of photoluminescence from a bottleneck region of the exciton-polariton band in a microcavity in the strong coupling regime and at strong pumping. These beats are extremely sensitive to the pumping intensity and vanish for weak pumping. We show theoretically that coherent polariton-polariton scattering which leads to the mixing between bright and dark exciton states can be responsible for this effect. (c) 2005 Elsevier Ltd. All rights reserved.
机译:我们报告了一种新的光学活性和暗晶态非线性耦合的机制。我们观察到在强耦合和强泵浦的微腔中,激子-极化带的瓶颈区域的光致发光强度的实验性拍子。这些节拍对泵浦强度非常敏感,对于弱泵浦消失。我们从理论上证明,导致亮和暗激子状态之间混合的相干极化子-极化子散射可能是造成这种效应的原因。 (c)2005 Elsevier Ltd.保留所有权利。

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