摘要
采用熔融–急冷法制备了GeS_2–Ga_2S_3–CdS硫系玻璃,用椭圆偏振仪、飞秒光Kerr技术分别测试了在室温玻璃的折射率和三阶非线性光学性能,分析了玻璃的组成、结构对玻璃的折射率与三阶非线性光学性能的影响。结果表明玻璃的折射率主要决定于Ge的含量;玻璃的三阶非线性极化率χ(3)与玻璃中S—Ge,S—Ga键的数量有关,当玻璃中S—Ge,S—Ga键的数量最多时,离子极化程度最大。电子云的变形程度最大时,具有最大的χ(3)。玻璃的超快三阶非线性光学系数与线性折射率n间的关系不遵循Miller规则。
GeS2-Ga2S3-CdS chalcogenide glasses were prepared by the conventional melt-quenching method. Utilizing the ellipsometry and femtosecond time-resolved optical Kerr gate technique, the linear refractive indexes and the third-order nonlinear optical properties of these glasses together with their dependence upon the composition and microstructure was investigated. The main conclusions were as follows： （1） The linear refractive index of these glasses is controlled by the germanium content. （2） The third nonlinear polarizability χ（3） is mainly related to the content of S-Ge and S-Ga bonds. （3） The relationship between ultra-fast third-order optical nonlinearity and its linear refractive index n does not obey the conventional Miller rules.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2006年第11期1311-1314,共4页
Journal of The Chinese Ceramic Society
基金
硅酸盐材料工程教育部重点实验室(武汉理工大学)开放基金(SYSJJ2005–13)
国家自然科学基金(50125205)资助项目。
关键词
硫系玻璃
三阶非线性光学效应
飞秒光学Kerr技术
折射率
chalcogenlde glass
third-order optical nonlinearity effect
femtosecond optical Kerr gate
refractive index
