NiPS3 nanoflakes: a nonlinear optical material for ultrafast photonics

Jiefeng Liu; Xinzhe Li; Yijun Xu; Yanqi Ge; Yunzheng Wang; Feng Zhang; Yingwei Wang; Yiyun Fang; Fumei Yang; Cong Wang; Yufeng Song; Shixiang Xu; Dianyuan Fan; Han Zhang

doi:10.1039/C9NR03964C

NiPS₃ nanoflakes: a nonlinear optical material for ultrafast photonics†

Jiefeng Liu,‡^a Xinzhe Li,‡^a Yijun Xu,‡^a Yanqi Ge,*^a Yunzheng Wang,^a Feng Zhang,^a Yingwei Wang,^a Yiyun Fang,^a Fumei Yang,^a Cong Wang,^a Yufeng Song,^a Shixiang Xu,*^b Dianyuan Fan^a and Han Zhang

^a

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* Corresponding authors

^a 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
E-mail: geyanqi@hotmail.com

^b Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, P.R. China
E-mail: shxxu@szu.edu.cn

Abstract

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.

Nanoscale

NiPS₃ nanoflakes: a nonlinear optical material for ultrafast photonics†

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