Bardeen-Cooper-Schrieffer区的极化子Laser
Polariton Laser in the Bardeen-Cooper-Schrieffer Regime
摘要：
微腔激子极化激元系统可以具有广泛的宏观量子效应，可以转化为更好的光子技术。极化子玻色-爱因斯坦凝聚和光子激射在低和高载流子密度的限制下已被广泛接受，但在中等密度下预期的巴丁-库珀-施里弗（BCS）态的识别仍然是难以捉摸的，因为光增益机制不能从现有的实验中直接推断。在这里，使用具有强偏振选择性的微腔，我们获得了直接的实验访问的存在下的极化激元凝聚和激射，这揭示了一个费米子增益机制的极化激元激光器的水库吸收。一个微观多粒子理论表明，这种极化激元激光状态是一致的一个开放耗散泵浦系统模拟的极化激元BCS状态。
英文摘要：
Microcavity exciton polariton systems can have a wide range of macroscopic quantum effects that may be turned into better photonic technologies. Polariton Bose-Einstein condensation and photon lasing have been widely accepted in the limits of low and high carrier densities, but identification of the expected Bardeen-Cooper-Schrieffer (BCS) state at intermediate densities remains elusive, as the optical-gain mechanism cannot be directly inferred from existing experiments. Here, using a microcavity with strong polarization selectivity, we gain direct experimental access to the reservoir absorption in the presence of polariton condensation and lasing, which reveals a fermionic gain mechanism underlying the polariton laser. A microscopic many-particle theory shows that this polariton lasing state is consistent with an open-dissipative-pumped system analog of a polaritonic BCS state.
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