American Chemical Society
jz3c00135_si_001.pdf (1.34 MB)

Magnetically Tunable Spontaneous Superradiance from Mesoscopic Perovskite Emitter Clusters

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journal contribution
posted on 2023-03-08, 21:33 authored by Ruihua He, Abdullah Rasmita, Lei Zhou, Liangliang Liang, Xiangbin Cai, Jiaye Chen, Hongbing Cai, Weibo Gao, Xiaogang Liu
Perovskite emitters are promising materials as next-generation optical sources due to their low fabrication cost and high quantum yield. In particular, the superradiant emission from a few coherently coupled perovskite emitters can be used to produce a bright entangled photon source. Here, we report the observation of superradiance from mesoscopic (<55) CsPbBr3 perovskite emitters, which have a much smaller ensemble size than the previously reported results (>106 emitters). The superradiance is spontaneously generated by off-resonance excitation and detected by time-resolved photoluminescence and second-order photon correlation measurements. We observed a remarkable magnetic tunability of the superradiant photon bunching, indicating a magnetic field-induced decoherence process. The experimental results can be well explained using a theoretical framework based on the microscopic master equation. Our findings shed light on the superradiance mechanism in perovskite emitters and enable low-cost quantum light sources based on perovskite.