Liquid metal as a broadband saturable absorber for passively Q-switched lasers  

作　　者：Tianqi Zhang Mudong Wang Yang Xue Jinlong Xu Zhenda Xie Shining Zhu 张天琦;王木东;薛杨;徐金龙;谢臻达;祝世宁(National Laboratory of Solid State Microstructures,Nanjing University,Nanjing 210093,China;School of Physics,Nanjing University,Nanjing 210093,China;School of Electronic Science and Engineering,Nanjing University,Nanjing 210093,China)

机构地区：[1]National Laboratory of Solid State Microstructures,Nanjing University,Nanjing 210093,China [2]School of Physics,Nanjing University,Nanjing 210093,China [3]School of Electronic Science and Engineering,Nanjing University,Nanjing 210093,China

出　　处：《Chinese Optics Letters》2020年第11期63-67,共5页中国光学快报（英文版）

基　　金：supported by the National Key R&D Program of China (Nos. 2017YFA0303700 and2019YFA0705000);the National Natural Science Foundation of China (Nos. 11774161,51890861,11690031,11627810,and 11674169);the Key R&D Program of Guangdong Province (No. 2018B030329001);the Leading-edge Technology Program of Jiangsu Natural Science Foundation (No. BK20192001)。

摘　　要：We demonstrated the efficient plasmon-induced nonlinear absorption of liquid metal GaInSn nanospheres prepared by a facile liquid-phase method. With GaInSn as saturable absorbers, a passively Q-switching operation was obtained at both 1.3 and 2 μm. The pulse width of 32 ns was achieved at 1.3 μm with repetition rate of44 kHz, single pulse energy of 51.9 μJ, and output power of 425 mW. Meanwhile, 510 ns and 92 kHz pulses with energy of 36.1 μJ and output power of 2.48 W were obtained at 2 μm. This work provides the potential of liquid metal for improving metal functions and flexible optical devices.

关 键 词：GaInSn nanosphere passively Q-switched lasers saturable absorber 

分 类 号：TN248.34[电子电信—物理电子学] TB383.1[一般工业技术—材料科学与工程]