采用溶胶-凝胶法, 以正硅酸乙酯、醋酸铅为先驱体, 将石墨烯纳米片(GNSs)引入二元无机凝胶网络中, 成功制备了Si-Pb二元复合凝胶玻璃。采用扫描电子显微镜、拉曼光谱、紫外可见吸收光谱和开孔Z-扫描对GNSs/Si-Pb二元复合凝胶玻璃的形貌、结构、线性光学和非线性光限幅性能进行研究。结果表明, 通过先驱体的水解缩聚可将GNSs成功引入到Si-Pb二元凝胶玻璃中, 所得复合凝胶玻璃具有良好的均匀性和高透明性。GNSs在引入Si-Pb二元凝胶玻璃后非线性光限幅性能有所提高且可通过调整GNSs在玻璃中的浓度来优化复合凝胶玻璃的光限幅性能。以上结果为拓展GNSs在非线性光学领域的材料化及器件化提供了实验依据及理论基础。

The Si-Pb binary composite gel glass was successfully prepared by sol-gel method using tetraethyl orthosilicate and lead acetate as precursors to introduce graphene nanosheets (GNSs) into the binary inorganic gel network. The morphology, structure, linear optics and nonlinear optical limiting properties of GNSs/Si-Pb binary composite gel glass were investigated by scanning electron microscopy, Raman spectroscopy, UV-visible absorption spectroscopy and open Z-scan technique. The results show that the GNSs can be successfully doped into the Si-Pb binary gel glass by the hydrolysis polycondensation of the precursor, and the obtained composite gel glass exhibits good uniformity and high transparency. The nonlinear optical limiting properties of GNSs have been significantly improved after incorporated into composite gel glass. Furthermore, the optical limiting properties of composite gel glass can be optimized by adjusting the concentration of GNSs in the glass. The above results provide an experimental basis and theoretical basis for expanding the materialization and deviceization of GNSs in the field of nonlinear optics.