Second-Order Temporal Coherence of Polariton Lasers Based on an Atomically Thin Crystal in a Microcavity
Second-Order Temporal Coherence of Polariton Lasers Based on an Atomically Thin Crystal in a Microcavity
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基于微腔中原子薄晶体的偏振子激光器的二阶时间相干性
DOI：
10.1103/physrevlett.131.206901
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发表时间：
2023
影响因子：
8.6
通讯作者：
Höfling, Sven
中科院分区：
文献类型：
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作者：
Shan, Hangyong;Drawer, Jens-Christian;Sun, Meng;Anton-Solanas, Carlos;Esmann, Martin;Yumigeta, Kentaro;Watanabe, Kenji;Taniguchi, Takashi;Tongay, Sefaattin;Höfling, Sven
微腔中激子极化激元的玻色凝聚和激光发射是一种有趣的固态现象。它提供了一个多功能的平台来研究非平衡多体物理学，最近出现在量子技术的最前沿。本文利用二阶时间相关函数研究了嵌入原子级薄晶体的光学微腔中的极化激元激光的光子统计特性。此外，我们研究了不同激发功率和温度下的宏观极化激元相变。低极化激元在阈值以下呈现出光子聚束现象，表明辐射的热分布占主导地位;而在阈值以上，二阶关联向1过渡，表明相干态的形成。我们的研究结果与微观数值模型一致，该模型明确包括量子水平上的声子散射。
Bosonic condensation and lasing of exciton polaritons in microcavities is a fascinating solid-state phenomenon. It provides a versatile platform to study out-of-equilibrium many-body physics and has recently appeared at the forefront of quantum technologies. Here, we study the photon statistics via the second-order temporal correlation function of polariton lasing emerging from an optical microcavity with an embedded atomically thincrystal. Furthermore, we investigate the macroscopic polariton phase transition for varying excitation powers and temperatures. The lower-polariton exhibits photon bunching below the threshold, implying a dominant thermal distribution of the emission, while above the threshold, the second-order correlation transits towards unity, which evidences the formation of a coherent state. Our findings are in agreement with a microscopic numerical model, which explicitly includes scattering with phonons on the quantum level.