Liu Jiefeng, Li Xinzhe, Xu Yijun, Ge Yanqi, Wang Yunzheng, Zhang Feng, Wang Yingwei, Fang Yiyun, Yang Fumei, Wang Cong, Song Yufeng, Xu Shixiang, Fan Dianyuan, Zhang Han
Collaborative Innovation Centre for Optoelectronic Science & Technology, and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, P.R. China.
Nanoscale. 2019 Aug 1;11(30):14383-14391. doi: 10.1039/c9nr03964c.
Ultrafast photonics based on two-dimensional (2D) materials has been used to investigate light-matter interactions and laser generation, as well as light propagation, modulation, and detection. Here, 2D metal-phosphorus trichalcogenides, which are known for applications in catalysis and electrochemical storage, also exhibit advantageous photonic properties as nanoflakes that are only a few layers thick. By using an open-aperture Z-scan system, few-layer NiPS3 nanoflakes exhibited a large modulation depth of 56% and a low saturable intensity of 16 GW cm-2 at 800 nm. When NiPS3 nanoflakes were used as a saturable absorber at 1066 nm, highly stable mode-locked pulses were generated. Thus, these results revealed the nonlinear optical properties of NiPS3 nanoflakes which have potential photonics applications, such as modulators, switches, and thresholding devices.
基于二维（2D）材料的超快光子学已被用于研究光与物质的相互作用、激光产生以及光的传播、调制和检测。在这里，以催化和电化学存储应用而闻名的二维金属三硫属磷化物，作为仅几层厚的纳米薄片，也表现出有利的光子特性。通过使用开孔Z扫描系统，几层厚的NiPS3纳米薄片在800nm处表现出56%的大调制度深度和16GW cm-2的低饱和强度。当NiPS3纳米薄片在1066nm处用作可饱和吸收体时，产生了高度稳定的锁模脉冲。因此，这些结果揭示了NiPS3纳米薄片的非线性光学特性，其具有潜在的光子学应用，如调制器、开关和阈值器件。
