Continuous-wave quasi-single-mode random lasing in CH₃NH₃PbBr₃ perovskite films on patterned sapphire substrates.

IF 3.1 2区物理与天体物理 Q2 OPTICS Optics letters Pub Date : 2024-07-01 DOI:10.1364/OL.525331

Guoen Weng, Zhan Su, Shoujie Ye, Xinyue Sun, Fuyi Cao, Cong Wang, Dongxin Jiang, Xiaobo Hu, Jiahua Tao, Hidefumi Akiyama, Junhao Chu, Shaoqiang Chen

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Abstract

We report intriguing continuous-wave quasi-single-mode random lasing in methylammonium lead bromide (CH₃NH₃PbBr₃) perovskite films synthesized on a patterned sapphire substrate (PSS) under excitation of a 532-nm laser diode. The random laser emission evolves from a typical multi-mode to a quasi-single-mode with increasing pump fluences. The full width at half-maximum of the lasing peak is as narrow as 0.06 nm at ∼547.8 nm, corresponding to a high Q-factor of ∼9000. Such excellent random lasing performance is plausibly ascribed to the exciton resonance in optical absorption at 532 nm and the enhanced optical resonance due to the increased likelihood for randomly scattered light to re-enter the optical loops formed among the perovskite grains by multi-reflection at the perovskite/PSS interfaces. This work demonstrates the promise of single-mode perovskite random lasers by introducing the exciton resonance effect and ingeniously designed periodic nano/micro optical structure.

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图案化蓝宝石衬底上 CH3NH3PbBr3 包晶石薄膜中的连续波准单模随机激光。

我们报告了在 532nm 激光二极管的激发下，在图案化蓝宝石衬底（PSS）上合成的溴化铅甲基铵（CH3NH3PbBr3）过氧化物薄膜中有趣的连续波准单模随机激光。随着泵浦流量的增加，随机激光发射从典型的多模演变为准单模。在 ∼547.8 nm 处，激光峰的半最大全宽窄至 0.06 nm，对应于 ∼9000 的高 Q 因子。如此出色的随机激光性能可能是由于 532 nm 波长处的光吸收中的激子共振，以及随机散射光在包晶/PSS 界面的多重反射作用下重新进入包晶晶粒间形成的光环的可能性增加所导致的光学共振增强。这项工作通过引入激子共振效应和巧妙设计的周期性纳米/微光学结构，展示了单模包晶随机激光器的前景。

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来源期刊

Optics letters 物理-光学

CiteScore

6.60

自引率

8.30%

发文量

2275

审稿时长

1.7 months

期刊介绍： The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.