Yu Qiang, Wang Shun, Zhang Yan, Dong Zhuo, Deng Haiqin, Guo Kun, Wang Tao, Shi Xinyao, Liu Fangqi, Xian Tianhao, Zhu Sicong, Wu Jian, Zhang Ziyang, Zhang Kai, Zhan Li
i-Lab & Key Laboratory of Nanodevices and Applications & Key Laboratory of Nanophotonic Materials and Devices, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China.
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China.
Nanoscale. 2021 Dec 16;13(48):20471-20480. doi: 10.1039/d1nr07075d.
Tantalum disulfide (TaS), an emerging group VB transition metal dichalcogenide, with unique layered structure, rich phase diagrams, metallic behavior, higher carrier concentration and mobility is emerging as a prototype for revealing basic physical phenomena and developing practical applications. However, its photonics properties and even engineering-related processes are still rare. Here, the top-down experiment demonstration, including synthesis, thickness optimization and nonlinear optical application, has been reported. In addition, the ultrafast (∼373 fs) erbium-doped fiber pulse with a small time-bandwidth product (∼0.34) and long-term stability (∼25 days) was realized using the nonlinear absorption properties of the high-quality 2H-TaS nanosheet. These results suggest an experimental route for further ultrafast photonics exploration based on metallic transition metal dichalcogenides.
二硫化钽（TaS）是一种新兴的VB族过渡金属二硫属化物，具有独特的层状结构、丰富的相图、金属行为、较高的载流子浓度和迁移率，正成为揭示基本物理现象和开发实际应用的原型。然而，其光学性质甚至与工程相关的过程仍然很少见。在此，报道了自上而下的实验演示，包括合成、厚度优化和非线性光学应用。此外，利用高质量2H-TaS纳米片的非线性吸收特性，实现了具有小时间带宽积（约0.34）和长期稳定性（约25天）的超快（约373 fs）掺铒光纤脉冲。这些结果为基于金属过渡金属二硫属化物的进一步超快光子学探索提供了一条实验途径。
