Photon-Number-Resolved Measurement of an Exciton-Polariton Condensate
Photon-Number-Resolved Measurement of an Exciton-Polariton Condensate
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DOI：
10.1103/physrevlett.121.047401
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发表时间：
2018-07-25
影响因子：
8.6
通讯作者：
Schneider, C.
中科院分区：
文献类型：
--
作者：
Klaas, M.;Schlottmann, E.;Schneider, C.
我们测量了微柱腔中玻色凝聚态激子极化激元的全光子数分布。通过光子数分辨过渡边缘传感器获得的统计数据。我们直接观察到的光子数分布的非共振光激发功率从几何准泊松统计，这是从热相干态的过渡规范的演变。此外，光子数分布允许一个评估更高阶的光子相关性，脱落进一步光的相干性形成和相变的极化激元凝聚体。实验数据进行了分析的热相干态，它给出了直接访问的热和相干分数从测量的分布。这些结果为全面理解光-物质凝聚体中相互作用对阈值相干性的贡献奠定了基础。
We measure the full photon-number distribution emitted from a Bose condensate of microcavity exciton polaritons confined in a micropillar cavity. The statistics are acquired by means of a photon-number-resolving transition edge sensor. We directly observe that the photon-number distribution evolves with the nonresonant optical excitation power from geometric to quasi-Poissonian statistics, which is canonical for a transition from a thermal to a coherent state. Moreover, the photon-number distribution allows one to evaluate the higher-order photon correlations, shedding further light on the coherence formation and phase transition of the polariton condensate. The experimental data are analyzed in terms of thermal-coherent states, which gives direct access to the thermal and coherent fraction from the measured distributions. These results pave the way for a full understanding of the contribution of interactions in light-matter condensates in the coherence buildup at threshold.