Li Chun, Yang Qi, Zu Yuqian, Din Syed Zaheer Ud, Yue Yu, Zhai Ruizhan, Jia Zhongqing
International School for Optoelectronic Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
School of Science, Shandong Jianzhu University, Jinan 250101, China.
Nanomaterials (Basel). 2023 Jun 30;13(13):1989. doi: 10.3390/nano13131989.
Two-dimensional (2D) materials own unique band structures and excellent optoelectronic properties and have attracted wide attention in photonics. Tin disulfide (SnS), a member of group IV-VI transition metal dichalcogenides (TMDs), possesses good environmental optimization, oxidation resistance, and thermal stability, making it more competitive in application. By using the intensity-dependent transmission experiment, the saturable absorption properties of the SnS nanosheet nearly at 3 μm waveband were characterized by a high modulation depth of 32.26%. Therefore, a few-layer SnS was used as a saturable absorber (SA) for a bulk Er:SrF laser to research its optical properties. When the average output power was 140 mW, the passively Q-switched laser achieved the shortest pulse width at 480 ns, the optimal single pulse energy at 3.78 µJ, and the highest peak power at 7.88 W. The results of the passively Q-switched laser revealed that few-layer SnS had an admirable non-linear optical response at near 3 μm mid-infrared solid-state laser.
二维（2D）材料具有独特的能带结构和优异的光电特性，在光子学领域引起了广泛关注。二硫化锡（SnS）是IV-VI族过渡金属二硫属化物（TMDs）的一员，具有良好的环境适应性、抗氧化性和热稳定性，使其在应用中更具竞争力。通过强度依赖传输实验，在近3μm波段对SnS纳米片的饱和吸收特性进行了表征，其调制深度高达32.26%。因此，将几层SnS用作块状Er:SrF激光器的饱和吸收体（SA）来研究其光学特性。当平均输出功率为140 mW时，被动调Q激光器实现了480 ns的最短脉冲宽度、3.78 µJ的最佳单脉冲能量以及7.88 W的最高峰值功率。被动调Q激光器的结果表明，几层SnS在近3μm中红外固态激光器中具有出色的非线性光学响应。
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