Abstract

Due to the composition-dependent properties of two-dimensional (2D) transition metal dichalcogenides (TMDs), alloying of existing dissimilar TMDs architecture is a novel and controllable route to tailor crystal structures with superior optical and optoelectronic properties. Here, we reported the hexagonal-phase WSe_1.4Te_0.6 alloy can enable great promise for enhanced saturable absorption response exceeding the parent component WSe₂ and WTe₂, with larger modulation depth and lower saturable intensity. These advantages allowed the 1064 nm passively Q-switched lasers based on WSe_1.4Te_0.6 to be more efficient, with pulse duration narrowed to 45%, and slope efficiency increased by 232%. Our findings highlighted the appropriate alloying of TMDs as an effective strategy for development of saturable absorbers.

© 2019 Chinese Laser Press

Nonlinear optical properties of WSe₂ and MoSe₂ films and their applications in passively Q-switched erbium doped fiber lasers

Wenjun Liu, Mengli Liu, Hainian Han, Shaobo Fang, Hao Teng, Ming Lei, and Zhiyi Wei
Photon. Res. 6(10) C15-C21 (2018)

Passively Q-switched 1.5-1.6 μm Er:Yb:LuAl₃(BO₃)₄ laser with Co²⁺:Mg_0.4Al_2.4O₄ saturable absorber

Yujin Chen, Yanfu Lin, Yuqi Zou, Zundu Luo, and Yidong Huang
Opt. Express 20(9) 9940-9947 (2012)

Few-layered MoS₂ as a saturable absorber for a passively Q-switched Er:YAG laser at 1.6  μm

Hongwang Xia, Ming Li, Tao Li, Shengzhi Zhao, Guiqiu Li, and Kejian Yang
Appl. Opt. 56(10) 2766-2770 (2017)

WSe₂ as a saturable absorber for a passively Q-switched Ho,Pr:LLF laser at 2.95 µm

Xinxing Liu, Shuaiyi Zhang, Zhengyu Yan, Lei Guo, Xiaoyan Fan, Fei Lou, Maorong Wang, Peng Gao, Guanghai Guo, Tao Li, Kejian Yang, Jian Li, and Jianqiu Xu
Opt. Mater. Express 8(5) 1213-1220 (2018)

High-power passively Q-switched 2.0 μm all-solid-state laser based on a MoTe₂ saturable absorber

Bingzheng Yan, Baitao Zhang, Hongkun Nie, Haoyuan Wang, Guoru Li, Xiaoli Sun, Ruihua Wang, Na Lin, and Jingliang He
Opt. Express 26(14) 18505-18512 (2018)