Su Xiancui, Nie Hongkun, Wang Yiran, Li Guoru, Yan Bingzheng, Zhang Baitao, Yang Kejian, He Jingliang
Opt Lett. 2017 Sep 1;42(17):3502-3505. doi: 10.1364/OL.42.003502.
A novel two-dimensional (2D) material member in the transition metal dichalcogenides family, few-layered rhenium disulfide (ReS) was prepared by liquid phase method successfully. By using the open-aperture Z-scan method, the saturable absorption properties at 2.8 μm were characterized with a saturable fluence of 22.6 μJ/cm and a modulation depth of 9.7%. A passively Q-switched solid-state laser at 2.8 μm was demonstrated by using the as-prepared ReS saturable absorber successfully. Under an absorbed pump power of 920 mW, a maximum output power of 104 mW was obtained with a pulse width of 324 ns and a repetition rate of 126 kHz. To the best of our knowledge, this is the first demonstration of applying ReS in an all-solid-state laser. Moreover, this represents the shortest pulses in Q-switched MIR lasers based on a 2D material as the saturable absorber, which demonstrated the superiority of ReS acting as an optical modulator for generating short-pulsed lasers. The results well prove that 2D ReS is a reliable optical modulator for MIR solid-state lasers.
通过液相法成功制备了过渡金属二硫属化物家族中的一种新型二维（2D）材料成员——少层二硫化铼（ReS₂）。采用开孔Z扫描法对其在2.8μm处的饱和吸收特性进行了表征，饱和通量为22.6 μJ/cm²，调制深度为9.7%。利用所制备的ReS₂饱和吸收体成功实现了2.8μm波长的被动调Q固态激光器。在920 mW的吸收泵浦功率下，获得了104 mW的最大输出功率，脉冲宽度为324 ns，重复频率为126 kHz。据我们所知，这是首次将ReS₂应用于全固态激光器的演示。此外，这代表了基于二维材料作为饱和吸收体的调Q中红外激光器中最短的脉冲，证明了ReS₂作为产生短脉冲激光器的光调制器的优越性。结果充分证明二维ReS₂是中红外固态激光器可靠的光调制器。
