Nonlinear optical response of thermally stable perovskite for near-infrared optical modulator

• Published in: Journal of Materiomics Vol. 11; no. 1; p. 100858
• Main Authors: Wang, Jiang, Xie, Liang, Liu, Jingjing, Sun, Yuxuan, Xu, Jinglong, Li, Jiacheng, Zhang, Zhongying, Qin, Chengbing, Xiao, Liantuan, Zhang, Guofeng, Wang, Yonggang, Yang, Zhichun, Cheng, Guanghua
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.2025; Elsevier
• Subjects: Laser; Nonlinear optical; Optical modulator; Perovskite; Perovskite; Nonlinear optical; Laser; Optical modulator
• ISSN: 2352-8478
• DOI: 10.1016/j.jmat.2024.03.004

Metal halide perovskite has generated significant attention due to its high optical absorption coefficient, the tunability of bandgap, and its solution processing properties, all of which have led to a range of applications including solar cells, photodetectors, light-emitting diodes and lasers. However, the material's application as an optical modulator for high-energy ultrafast lasers is still limited by its slow nonlinear optical response, low damage threshold and the inferior stability. Herein, we developed a saturable absorber (SA) with the thermally stable Cs0.15FA0.85PbI2.85Br0.15 perovskite thin films as an optical modulator towards the near-infrared nanosecond passively Q-switched Nd:YAG laser generation for the first time. The Cs0.15FA0.85PbI2.85Br0.15 perovskite SA optical modulator produced an exceptional nonlinear optical response with a notable modulation depth of 15.1%, an ultrashort recovery time of 52.46 ps, and a high optical damage threshold exceeding 275.9 mJ/cm2. Of further significance, it displayed an excellent operational stability, and when incorporated into the oscillator of the Nd:YAG laser, allowed for a stable operation of 166 ns pulse laser with a center wavelength of 1.06 μm. The findings provide a pathway for the employment of the Cs0.15FA0.85PbI2.85Br0.15 perovskite SA optical modulator in near-infrared ultrafast laser applications. [Display omitted] •Thermally stable perovskite for near-infrared optical modulator was reported for the first time.•Nonlinear optical response and carrier dynamics of perovskite optical modulator were studied.•Passively Q-switched laser operation at 1,064 nm with pulse width of 166 ns were successfully achieved.