Cooperative excitonic quantum ensemble in perovskite-assembly superlattice microcavities

Chun Zhou, Yichi Zhong, Hongxing Dong (), Weihao Zheng, Jiqing Tan, Qi Jie, Anlian Pan, Long Zhang () and Wei Xie ()
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Chun Zhou: Chinese Academy of Sciences
Yichi Zhong: East China Normal University
Hongxing Dong: Chinese Academy of Sciences
Weihao Zheng: College of Materials Science and Engineering, Hunan University
Jiqing Tan: East China Normal University
Qi Jie: East China Normal University
Anlian Pan: College of Materials Science and Engineering, Hunan University
Long Zhang: Chinese Academy of Sciences
Wei Xie: East China Normal University

Nature Communications, 2020, vol. 11, issue 1, 1-7

Abstract: Abstract Perovskites—compounds with the CaTiO3-type crystal structure—show outstanding performance in photovoltaics and multiparameter optical emitters due to their large oscillator strength, strong solar absorption, and excellent charge-transport properties. However, the ability to realize and control many-body quantum states in perovskites, which would extend their application from classical optoelectronic materials to ultrafast quantum operation, remains an open research topic. Here, we generate a cooperative quantum state of excitons in a quantum dot ensemble based on a lead halide perovskite, and we control the ultrafast radiation of excitonic quantum ensembles by introducing optical microcavites. The stimulated radiation of excitonic quantum ensemble in a superlattice microcavity is demonstrated to not be limited by the classical population-inversion condition, leading to a picosecond radiative duration time to dissipate all of the in-phase dipoles. Such a perovskite-assembly superlattice microcavity with a tunable radiation rate promises potential applications in ultrafast, photoelectric-compatible quantum processors.

Date: 2020
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DOI: 10.1038/s41467-019-14078-1

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