Lasing properties and carrier dynamics of CsPbBr3 perovskite nanocrystal vertical-cavity surface-emitting laser
He Yawen,
Su Zhan,
Cao Fuyi,
Cao Zhenghao,
Liu Yuejun,
Zhao Chunhu,
Weng Guoen,
Hu Xiaobo,
Tao Jiahua,
Chu Junhao,
Akiyama Hidefumi,
Chen Shaoqiang
Affiliations
He Yawen
State Key Laboratory of Precision Spectroscopy, Department of Electronic Engineering, East China Normal University, 500 Dongchuan Road, Shanghai200241, China
Su Zhan
State Key Laboratory of Precision Spectroscopy, Department of Electronic Engineering, East China Normal University, 500 Dongchuan Road, Shanghai200241, China
Cao Fuyi
State Key Laboratory of Precision Spectroscopy, Department of Electronic Engineering, East China Normal University, 500 Dongchuan Road, Shanghai200241, China
Cao Zhenghao
State Key Laboratory of Precision Spectroscopy, Department of Electronic Engineering, East China Normal University, 500 Dongchuan Road, Shanghai200241, China
Liu Yuejun
State Key Laboratory of Precision Spectroscopy, Department of Electronic Engineering, East China Normal University, 500 Dongchuan Road, Shanghai200241, China
Zhao Chunhu
State Key Laboratory of Precision Spectroscopy, Department of Electronic Engineering, East China Normal University, 500 Dongchuan Road, Shanghai200241, China
Weng Guoen
State Key Laboratory of Precision Spectroscopy, Department of Electronic Engineering, East China Normal University, 500 Dongchuan Road, Shanghai200241, China
Hu Xiaobo
State Key Laboratory of Precision Spectroscopy, Department of Electronic Engineering, East China Normal University, 500 Dongchuan Road, Shanghai200241, China
Tao Jiahua
State Key Laboratory of Precision Spectroscopy, Department of Electronic Engineering, East China Normal University, 500 Dongchuan Road, Shanghai200241, China
Chu Junhao
State Key Laboratory of Precision Spectroscopy, Department of Electronic Engineering, East China Normal University, 500 Dongchuan Road, Shanghai200241, China
Akiyama Hidefumi
Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba277-8581, Japan
Chen Shaoqiang
State Key Laboratory of Precision Spectroscopy, Department of Electronic Engineering, East China Normal University, 500 Dongchuan Road, Shanghai200241, China
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.
