Self-modulated photoluminescence of CrBr 3 flake

Micro & nano letters

article

Yujun Zhang¹  Gaomin Li¹  Shenghai Pei²  Bingbing Lyu²  Qiaoling Huang²  Xinwei Wang¹  Wei He²  Mingyuan Huang² 

[1] School of Advanced Materials, Shenzhen Graduate School Peking University;Department of Physics, Southern University of Science and Technology

关键词: photoluminescence;    spectral line shift;    insulating materials;    Fabry-Perot resonators;    vibrational modes;    chromium compounds;    layered van der Waals magnetic insulator chromium bromine;    interference fringes;    Fabry–Perot resonance;    Stokes shift;    absorption band;    resonant intensity;    blue shift;    self-modulated photoluminescence spectrum;    thermal vibration;    temperature 300 K to 80 K;    CrBr3;   

DOI  :  10.1049/mnl.2020.0260

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

The layered van der Waals magnetic insulator chromium bromine (CrBr 3 ) has excellent optical properties and it provides an interesting platform for investigating light–matter interactions. Here, we focused on its self-modulated photoluminescence (PL) spectrum. We find that there are interference fringes superposed on the PL curves due to the Fabry–Perot resonance between the front and rear interfaces of CrBr 3 flakes. Moreover, there is a huge Stokes shift between the PL spectrum and lowest absorption band, which can prevent reabsorption of PL and is a benefit for enhancing the resonant intensity of the PL spectrum. In addition, we investigate the PL spectrum variation under suppressing thermal vibration with decreasing temperature from 300 to 80 K, which shows the significant increase of PL intensity and blue shift of PL maximum peak. This work gives details of CrBr 3 self-modulated PL properties and creates opportunities for using CrBr 3 in optical devices and lasing components in future applications.

【 授权许可】

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