Photonics Research, 2020, 8 (12): 12001881, Published Online: Nov. 23, 2020
Superior third-order nonlinearity in inorganic fullerene-like WS2 nanoparticles Download: 595次
Figures & Tables
Fig. 1. Structure of IF-like WS 2 NPs and their optical response. (a) Scanning electron microscopy image, (b) high-resolution transmission electron microscopy image, and (c) X-ray diffraction pattern of the synthesized IF-like WS 2 NPs. (d) Raman spectra of the WS 2 dispersion excited by 633 and 532 nm lasers. (e) Transmittance of WS 2 NP dispersions. The interesting wavelength range is highlighted in the gray area.
Fig. 2. (a) Schematic of the experimental setup and (b) evolution of the concentric ring-shaped diffraction patterns excited by a fs pulse laser at λ = 800 nm . The time capturing the diffraction patterns is inserted at the upper-left corner of each image.
Fig. 3. (a) Dependence of the number of SSPM rings N on the laser intensity I at different wavelengths. (b) Dependence of nonlinear refractive index and third-order susceptibility of monolayer IF − WS 2 NPs on wavelength.
Fig. 4. Evolution of the diameter of the outermost SSPM ring along the vertical and horizontal directions and Δ n 2 / n 2 at λ = 800 nm .
Table1. and for Different 2D Materials Obtained by SSPM
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Tianlun Li, Rui Hao, Lingling Zhang, Jianyong Mao, Feng Li, Yanpeng Zhang, Jixiang Fang, Lei Zhang. Superior third-order nonlinearity in inorganic fullerene-like WS2 nanoparticles[J]. Photonics Research, 2020, 8(12): 12001881.