非共振激发下极化子流体的鬼支光致发光
Ghost Branch Photoluminescence From a Polariton Fluid Under Nonresonant Excitation
摘要：
本文研究了在小光斑激光脉冲非共振激发下的极化激元凝聚。远高于冷凝阈值，我们观察到一个显着增加的色散曲率与随后的线性化的光谱和强烈的发光从鬼分支正交偏振相对于线性偏振的冷凝物排放。鬼分支的存在已被证实在时间分辨测量。讨论了极化激元凝聚体光致发光中的耗散效应和非平衡效应及其激发。
英文摘要：
An expanding polariton condensate is investigated under pulsed nonresonant excitation with a small laser pump spot. Far above the condensation threshold we observe a pronounced increase in the dispersion curvature with a subsequent linearization of the spectrum and strong luminescence from a ghost branch orthogonally polarized with respect to the linearly polarized condensate emission. The presence of the ghost branch has been confirmed in time-resolved measurements. The dissipative and nonequilibrium effects in the photoluminescence of polariton condensates and their excitations are discussed.
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