Controllable Growth of Aligned Monocrystalline CsPbBr3 Microwire Arrays for Piezoelectric-Induced Dynamic Modulation of Single-Mode Lasing

Zheng Yang; Junfeng Lu; Minghua ZhuGe; Yang Cheng; Jufang Hu; Fangtao Li; Shuang Qiao; Yufei Zhang; Guofeng Hu; Qing Yang; Dengfeng Peng; Kaihui Liu; Caofeng Pan

doi:10.1002/adma.201900647

Controllable Growth of Aligned Monocrystalline CsPbBr₃ Microwire Arrays for Piezoelectric-Induced Dynamic Modulation of Single-Mode Lasing

Adv Mater. 2019 May;31(18):e1900647. doi: 10.1002/adma.201900647. Epub 2019 Mar 25.

Authors

Zheng Yang^{1

2}, Junfeng Lu^{1

2}, Minghua ZhuGe³, Yang Cheng⁴, Jufang Hu¹, Fangtao Li¹, Shuang Qiao¹, Yufei Zhang¹, Guofeng Hu^{1

2}, Qing Yang³, Dengfeng Peng⁵, Kaihui Liu⁴, Caofeng Pan^{1

2

5

6}

Affiliations

¹ CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, P. R. China.
² School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
³ State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
⁴ State Key Laboratory for Mesoscopic Physics, Collaborative Innovation Centre of Quantum Matter, School of Physics, Peking University, Beijing, 100871, China.
⁵ College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, P. R. China.
⁶ Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning, Guangxi, 530004, P. R. China.

PMID: 30908795
DOI: 10.1002/adma.201900647

Abstract

CsPbBr₃ shows great potential in laser applications due to its superior optoelectronic characteristics. The growth of CsPbBr₃ wire arrays with well-controlled sizes and locations is beneficial for cost-effective and largely scalable integration into on-chip devices. Besides, dynamic modulation of perovskite lasers is vital for practical applications. Here, monocrystalline CsPbBr₃ microwire (MW) arrays with tunable widths, lengths, and locations are successfully synthesized. These MWs could serve as high-quality whispering-gallery-mode lasers with high quality factors (>1500), low thresholds (<3 µJ cm^-2 ), and long stability (>2 h). An increase of the width results in an increase of the laser quality and the resonant mode number. The dynamic modulation of lasing modes is achieved by a piezoelectric polarization-induced refractive index change. Single-mode lasing can be obtained by applying strain to CsPbBr₃ MWs with widths between 2.3 and 3.5 µm, and the mode positions can be modulated dynamically up to ≈9 nm by changing the applied strain. Piezoelectric-induced dynamic modulation of single-mode lasing is convenient and repeatable. This method opens new horizons in understanding and utilizing the piezoelectric properties of lead halide perovskites in lasing applications and shows potential in other applications, such as on-chip strain sensing.

Keywords: CsPbBr3; arrays; mode shift; piezoelectric; single-mode lasers.

Abstract

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