团簇WOS_3Cu_3I(2-MePy)_3激发态非线性光学性质  

Excited-State Nonlinear Optical Properties of Cluster WOS_3Cu_3I(2-MePy)_3

作　　者：方光宇[1] 宋瑛林[1] 王玉晓[1] 张学如[1] 忻新泉[2] 张驰[2] 李淳飞[1] 

机构地区：[1]哈尔滨工业大学应用物理系,哈尔滨150001 [2]南京大学配位化学国家重点实验室,南京210093

出　　处：《光学学报》2001年第5期541-544,共4页Acta Optica Sinica

摘　　要：用Z扫描方法测量了团簇WOS3Cu3I(2 MePy) 3对 5 32nm、8ns激光脉冲的非线性光学响应曲线。以速率方程为基础对实验结果进行拟合 ,理论计算和实验结果符合得很好。应用激发态折射理论研究了非线性折射率系数的符号变化和折射度比值Kr 的关系 ,Kr>1时非线性折射率系数为正 ,Kr<1时折射率系数为负。The nonlinear optical properties of cluster WOS 3Cu 3I(2 MePy) 3 by using the Z scan method were studied. The experimental results were simulated based on the steady state solution of rate equations, and the third order nonlinear optical parameters of the cluster were obtained. The theoretical curves are in good agreement with experimental results. The relationship between the sign of the nonlinear refraction index and the ratio of the refrangibilities K r has also been studied. It is demonstrated that when K r>1 the nonlinearity is positive, while K r<1 negative. Numerical results are in consistent with the theory.

关 键 词：非线性光学 激发态 团簇 Z扫描 速率方程 非线性折射率系数 

分 类 号：O437[机械工程—光学工程]