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Applied Physics 2021
Al2O3/MoS2/Graphene复合薄膜的非线性光学研究
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Abstract:
为研究石墨烯和二硫化钼复合材料的非线性光学特性，采用磁控溅射法，液相剥离法和真空抽滤法制备了Al2O3/MoS2/Graphene纳米复合薄膜样品，通过SEM和紫外可见分光光度计对材料的结构和形貌进行了表征。利用开孔Z扫描技术测试了不同条件下复合薄膜的非线性吸收特性，并分析了其非线性吸收机制。测试结果表明，在波长800 nm脉冲能量800 nJ的激光激发下和波长1030 nm脉冲能量800 nJ激光激发下，复合薄膜样品均表现为饱和吸收特性，且随着石墨烯和二硫化钼的复合，薄膜的非线性吸收效应明显增强，这说明了复合膜有着比单独石墨烯和二硫化钼薄膜更好的非线性响应。制备的Al2O3/MoS2/Graphene纳米复合薄膜样品，在超快光子学器件有良好的应用前景。
In order to study the nonlinear optical properties of Graphene and molybdenum disulphide composite materials, Al2O3/MoS2/Graphene composite film samples were prepared by magnetron sputtering method, liquid phase stripping method and vacuum filtration method. The structure and morphology of the materials were characterized by SEM and UV-visible spectrophotometer. The nonlinear absorption characteristics of composite films under different conditions were tested by using the open-hole Z-scan technique, and the nonlinear absorption mechanism was analyzed. Test results show that the wavelength of 800 nm laser pulse energy 800 nJ inspired and wavelength of 1030 nm 800 nJ excitation laser pulse energy, composite film samples show the saturated absorption properties, and as graphene and molybdenum disulfide composite film markedly improved nonlinear absorption effect, it shows that the composite film has better than separate graphene and molybdenum disulfide thin film of nonlinear response. The Al2O3/MoS2/Graphene composite film sample prepared has a good application prospect in ultra-fast photonics devices.
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