Abstract
Abstract
Optical nonlinear absorption and refraction of spherical MoS2/TiO2 nanocomposites were measured using Z-scan and spatial self-phase modulation (SSPM) at different wavelengths. The linear absorption spectra showed that MoS2/TiO2 nanocomposite had obvious absorption at 500–700 nm, which was mainly attributed to the shape of MoS2 and demonstrated by the finite-difference time-domain method. For nonlinear absorption, MoS2/TiO2 composite showed enhanced two-photon absorption with high photon energy excitation (400 nm), and a tunable saturated single-photon absorption with low photon energy excitation (700 nm). For nonlinear refraction, it had no SSPM signal with short wavelength, but enhanced SSPM signal with long wavelength in visible band. These unconventional phenomena can be explained by the change of main absorber and the reversal of carriers transfer direction together.
Funder
National Natural Science Foundation of China
Subject
Surfaces, Coatings and Films,Acoustics and Ultrasonics,Condensed Matter Physics,Electronic, Optical and Magnetic Materials
Cited by
5 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献