Lasing properties and carrier dynamics of CsPbBr3 perovskite nanocrystal vertical-cavity surface-emitting laser
Author:
He Yawen1, Su Zhan1, Cao Fuyi1, Cao Zhenghao1, Liu Yuejun1, Zhao Chunhu1, Weng Guoen1, Hu Xiaobo1, Tao Jiahua1, Chu Junhao1, Akiyama Hidefumi2, Chen Shaoqiang12ORCID
Affiliation:
1. State Key Laboratory of Precision Spectroscopy, Department of Electronic Engineering , East China Normal University , 500 Dongchuan Road , Shanghai 200241 , China 2. Institute for Solid State Physics, The University of Tokyo , 5-1-5 Kashiwanoha , Kashiwa , Chiba 277-8581 , Japan
Abstract
Abstract
All-inorganic lead halide perovskite nanocrystals (NCs) have been widely investigated as highly promising optical gain materials due to their compelling electrical and optical properties. Although many efforts have been carried out, a deep understanding of perovskite NC vertical-cavity surface-emitting lasers (VCSELs) is elusive, which is very important in the development of photoelectronic integrated circuits. Along these lines, in this work, a low lasing threshold (22 μJ/cm2) single-mode VCSEL consisting of CsPbBr3 NCs film and two distributed Bragg reflectors was successfully constructed. The CsPbBr3 NCs were synthesized by using the supersaturated recrystallization method. Interestingly, benefiting from the strong coupling between the active layer and the optical field in the cavity, a single-mode lasing at 527 nm was demonstrated under femtosecond optical pumping. The carrier dynamics of the perovskite NC VCSEL was also thoroughly investigated by performing pump intensity-dependent time-resolved photoluminescence measurements. The typical gain-switching phenomenon was observed with an ultrafast decay of the laser pulse of ∼10 ps. Our work provides valuable insights for the implementation of the CsPbBr3 NC VCSEL for various optoelectronic applications.
Funder
Shanghai Committee of Science and Technology National Natural Science Foundation of China Japan Society for the Promotion of Science the National Key R&D Program of China
Publisher
Walter de Gruyter GmbH
Subject
Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,Biotechnology
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