Photonics Research, 2018, 6 (11): 11001040, Published Online: Nov. 11, 2018
Broadband nonlinear optical resonance and all-optical switching of liquid phase exfoliated tungsten diselenide Download: 521次
Abstract
As a kind of two-dimensional transition metal dichalcogenide material, tungsten diselenide (WSe 2 ) has attracted increasing attention, owing to its gapped electronic structure, relatively high carrier mobility, and valley pseudospin, all of which show its valuable nonlinear optical properties. There are few studies on the nonlinear optical properties of WSe 2 and correlation with its electronic structure. In this paper, the effects of spatial self-phase modulation (SSPM) and distortion influence of WSe 2 ethanol suspensions are systematically studied, namely, the nonlinear refractive index and third-order nonlinear optical effect. We obtained the WSe 2 dispersions SSPM distortion formation mechanism, and through it, we calculated the nonlinear refractive index n 2 , nonlinear susceptibility χ ( 3 ) , and their wavelength dependence under the excitation of 457 nm, 532 nm, and 671 nm lasers. Moreover, by use of its strong and broadband nonlinear optical response, all-optical switching of two different laser beams due to spatial cross-phase modulation has been realized experimentally. Our results are useful for future optical devices, such as all-optical switching and all-optical information conversion.
Yue Jia, Youxian Shan, Leiming Wu, Xiaoyu Dai, Dianyuan Fan, Yuanjiang Xiang. Broadband nonlinear optical resonance and all-optical switching of liquid phase exfoliated tungsten diselenide[J]. Photonics Research, 2018, 6(11): 11001040.