Observation of transition from superfluorescence to polariton condensation in CsPbBr3 quantum dots film  

作　　者：Danqun Mao Linqi Chen Zheng Sun Min Zhang Zhe-Yu Shi Yongsheng Hu Long Zhang Jian Wu Hongxing Dong Wei Xie Hongxing Xu 

机构地区：[1]State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200241,China [2]Key Laboratory of Materials for High-Power Laser,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,201800 Shanghai,China [3]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan,Shanxi 030006,China [4]Chongqing Key Laboratory of Precision Optics,Chongqing Institute of East China Normal University,Chongqing 401121,China [5]CAS Center for Excellence in Ultraintense Laser Science,Shanghai 201800,China [6]School of Physics and Technology,Center for Nanoscience and Nanotechnology,Wuhan University,Wuhan 430072,China

出　　处：《Light(Science & Applications)》2024年第2期316-324,共9页光（科学与应用)（英文版）

基　　金：The work was supported by the National Natural Science Foundation of China(12174111,12004115,1674097,61675219,61875256,12174112,61925506,12374297,62305078);the National Key Research and Development Program of China(2021YFA1200803);the Natural Science Foundation of Shanghai(23ZR1419800,20JC1414605);Chongqing and Zhejiang Province(2023NSCQ-MSX1489 and TD2020002);Shanghai Sailing Program(20YF1411600).

摘　　要：The superfluorescence effect has received extensive attention due to the many-body physics of quantum correlation in dipole gas and the optical applications of ultrafast bright radiation field based on the cooperative quantum state.Here,we demonstrate not only to observe the superfluorescence effect but also to control the cooperative state of the excitons ensemble by externally applying a regulatory dimension of coupling light fields.A new quasi-particle called cooperative exciton-polariton is revealed in a light-matter hybrid structure of a perovskite quantum dot thin film spin-coated on a Distributed Bragg Reflector.Above the nonlinear threshold,polaritonic condensation occurs at a nonzero momentum state on the lower polariton branch owning to the vital role of the synchronized excitons.The phase transition from superfluorescence to polariton condensation exhibits typical signatures of a decrease of the linewidth,an increase of the macroscopic coherence as well as an accelerated radiation decay rate.These findings are promising for opening new potential applications for super-brightness and unconventional coherent light sources and could enable the exploitation of cooperative effects for quantum optics.

关 键 词：quantum CONDENSATION POLAR 

分 类 号：O41[理学—理论物理]