3种配合物的非线性光学性能与分子结构的关系

Relationship between nonlinear optical property and molecular structures of three organometallic complexes

为了探索配合物的分子结构对3阶非线性光学性质的影响,采用z扫描方法对3种具有不同中心金属原子(Ni,Cu和Pd)的金属有机配合物的3阶非线性光学性能进行了研究。通过比较3种化合物的非线性折射率和激发态吸收截面发现,原子序数较大的中心金属原子明显增强了分子的非线性光学系数,而共振吸收效应对化合物的非线性光学性质影响不大。结果表明,在532nm波长的皮秒脉冲激光作用下,3种化合物均表现出自聚焦和反饱和吸收特性。

To explore the influence of molecular structures on the nonlinear optical property, the third-order nonlinear optical property of three organometallic complexes with different central metallic atoms （ Ni, Cu, and Pd） was investigated by means of z-scan technique. After comparing the nonlinear refractive indexes and the excited state absorption cross-sections of the eomplexes, it was found that the heavy central metallic atom enhanced the third-order optical property obviously, hut the resonant absorption did not have much effect on the nonlinear optical property. The experiment results show that all the three complexes have self focusing and reverse saturation absorption characteristics.