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

• DOI: 10.1016/j.jmat.2024.03.004
• Publication Date: 2024-04-06T16:53:59Z
• Authors: Jiang Wang; Liang Xie; Jingjing Liu; Yuxuan Sun; Jinglong Xu; Jiacheng Li; Zhongying Zhang; Chengbing Qin; Liantuan Xiao; Guofeng Zhang; Yonggang Wang; Zhichun Yang; Guanghua Cheng
• Keywords: Nanosecond; Saturable absorption

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