【摘要】 采用溶剂热法合成了二硒化钼/石墨烯（MoSe₂/rGO）复合材料，进一步通过滴涂法制备了二硒化钼/石墨烯/聚乙烯醇（MoSe₂/rGO/PVA）薄膜。通过X射线衍射仪（XRD）、激光拉曼光谱仪、傅里叶变换红外光谱仪（FT-IR）、透射电子显微镜（TEM）、X射线光电子能谱仪（XPS）和紫外可见分光光度计（UV-Vis）对MoSe₂/rGO复合材料和薄膜材料的结构、形貌、成分和吸收特性进行分析。采用Z-扫描技术，在激光光源为1064和532 nm，脉冲宽度为4 ns条件下，研究了MoSe₂/rGO溶液和薄膜的三阶非线性光学（NLO）性质。结果表明，MoSe₂/rGO/PVA薄膜的三阶NLO性质明显高于MoSe₂溶液、MoSe₂/rGO溶液和MoSe₂/PVA薄膜。在入射能量25μJ，激发波长532 nm条件下，MoSe₂/rGO/PVA薄膜材料显示了更大的非线性吸收系数。本工作为过渡金属硫族化合物/石墨烯复合材料在光限幅和激光锁模中的应用奠定基础。更多还原

【Abstract】 Molybdenum diselenide/graphene（MoSe₂/rGO） composite was synthesized by a facile solvothermal reaction, and the molybdenum diselenide/graphene/polyvinyl alcohol（MoSe₂/rGO/PVA） film was further prepared by simple drop casting technique. The structure, morphology, component and absorption characteristics of MoSe₂/rGO composite were analyzed by X-ray diffraction, raman spectra, fourier transform infrared spectrometry, transmission electron microscope, X-ray photoelectron spectrometer and ultraviolet visible spectrophotometer. The third order nonlinear optical（NLO） properties of MoSe₂/rGO solution and film were investigated using the Z-scan technique at 1064 and 532 nm with 4 ns laser pulses. The results demonstrate that the third order NLO properties of MoSe₂/rGO/PVA film was larger than that of the MoSe₂ solution, MoSe₂/rGO solution and MoSe₂ film. The MoSe₂/rGO/PVA film exhibits much larger nonlinear absorption coefficient with incident energy of 25 μJ at 532 nm. The results pave the way for the application of transition metal dichalcogenides/graphene composite in the optical limiting and laser mode-locking.更多还原