Year
Month
(Peer-Reviewed) Tunable vertical cavity microlasers based on MAPbI₃ phase change perovskite
Rongzi Wang 王榕梓 ¹, Ying Su 苏莹 ¹, Hongji Fan 范鸿吉 ¹, Chengxiang Qi 齐成祥 ¹, Shuang Zhang 张霜 ² ³ ⁴, Tun Cao 曹暾 ¹
¹ School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116024, China
中国 大连 大连理工大学 光电工程与仪器科学学院
² New Cornerstone Science Laboratory, Department of Physics, University of Hong Kong, Hong Kong 999077, China
中国 香港 香港大学物理学系 新基石科学实验室
³ Department of Electrical & Electronic Engineering, University of Hong Kong, Hong Kong 999077, China
中国 香港 香港大学 电机电子工程学系
⁴ Materials Innovation Institute for Life Sciences and Energy (MILES), HKU-SIRI, Shenzhen 518052, China
中国 深圳 香港大学 生命科学与能源材料创新研究院
Opto-Electronic Advances, 2025-03-28
Abstract

Perovskite semiconductors show great promise as gain media for all-solution-processed single-mode microlasers. However, despite the recent efforts to improve their lasing performance, achieving tunable single-mode microlasers remains challenging.

In this work, we address this challenge by demonstrating a tunable vertical cavity surface emitting laser (VCSEL) employing a tunable gain medium of halide phase-change perovskites-specifically MAPbI₃ perovskite, sandwiched between two highly reflective mirrors composed of bottom-distributed Bragg reflectors (DBRs).

This VCSEL possesses single-mode lasing emission with a low threshold of 23.5 μJ cm⁻² under 160 K, attributed to strong optical confinement in the high-quality (Q) cavity. Upon the phase change of MAPbI₃ perovskite, both its gain and dielectric constant changes dramatically, enabling a wide (Δλ >9 nm) and temperature-sensitive (0.30 nm K⁻¹ rate) spectral tunability of lasing mode in the near-infrared (N-IR) region.

The laser displays excellent stability, demonstrating an 80% lifetime of >2.4×10⁷ pulses excitation. Our findings may provide a versatile platform for the next generation of tunable coherent light sources.
Tunable vertical cavity microlasers based on MAPbI₃ phase change perovskite_1
Tunable vertical cavity microlasers based on MAPbI₃ phase change perovskite_2
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Tunable vertical cavity microlasers based on MAPbI₃ phase change perovskite_4
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