摘要
Topological insulator materials,including Bi_(2)Te_(3),Sb_(2)Te_(3),Sb_(2)Te_(3),and Bi_(2)Se_(3),have attracted some attention due to their narrow band gaps,high carrier mobility,wide spectral absorption ranges and other characteristics.We report a new multi-compound topological insulator material BiSbTeSe_(2) that,compared with the traditional topological insulator composed of two elements,can integrate the physical advantages of each element,helpful to build an experimental platform with rich physical properties.The nonlinear optical characteristics of the quaternary material BiSbTeSe_(2) is obtained in the erbium-doped fiber laser.Using the BiSbTeSe_(2) as a saturable absorber material,the passive Q-switched and mode-locked fiber lasers are achieved.The pulse duration and signal-to-noise ratio(SNR)of the Q-switched fiber laser are 854 ns and 70 dB,respectively.Meanwhile,the pulse duration and SNR of the mode-locked fiber laser are 259 fs and 87.75 dB,respectively.This work proves that the BiSbTeSe_(2) has a considerable application prospect as a saturable absorber in fiber lasers,and provides a new reference for selection of high-performance saturable absorber materials.
作者
肖悦嘉
邢笑伟
崔文文
陈悦芊
周勤
刘文军
Yue-Jia Xiao;Xiao-Wei Xing;Wen-Wen Cui;Yue-Qian Chen;Qin Zhou;Wen-Jun Liu(State Key Laboratory of Information Photonics and Optical Communications,School of Science,Beijing University of Posts and Telecommunications,Beijing 100876,China;School of Mathematical and Physical Sciences,Wuhan Textile University,Wuhan 430200,China)
基金
the Beijing Natural Science Foundation(Grant No.JQ21019)
the National Natural Science Foundation of China(Grant Nos.12075034 and 11974003)。
