Enhanced Nonlinear Optical Response of Rectangular MoS2 and MoS2/TiO2 in Dispersion and Film

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• 作者：Xiaohong Li ; Kunhong Hu ; Bosai Lyu ; Jingdi Zhang ; Yingwei Wang ; Peng Wang ; Si Xiao ; Yongli Gao ; Jun He
• 刊名：Journal of Physical Chemistry C
• 出版年：2016
• 出版时间：August 18, 2016
• 年：2016
• 卷：120
• 期：32
• 页码：18243-18248
• 全文大小：365K
• 年卷期：0
• ISSN：1932-7455

文摘

The nonlinear response of the two-dimensional materials could be measured by the spatial self-phase modulation (SSPM) and Z scan. Most of these materials are irregular shapes. In this paper, we studied the nonlinear optical properties of rectangular layered MoS₂ and the corresponding MoS₂/TiO₂ composite in dispersion and the film, respectively. For dispersion measured by SSPM, the nonlinear refraction index of rectangular layered MoS₂ dispersion is larger than that of the MoS₂/TiO₂ composite dispersion. For film measured by Z scan, the nonlinear refractive index of the MoS₂/TiO₂ composite thin film is larger than that of the rectangular layered MoS₂ thin film. This research confirms the possibility of the nonlocal electron coherence established among the alignment in SSPM and provides two different paths for the enhancement of the nonlinear optical properties of MoS₂.