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本工作报道了由皮秒激光和 Z-扫描技术在两种推拉型偶氮化合物 ,对硝基苯偶氮 - N,N—二甲基苯胺 ( NPADMPA)和对硝基苯偶氮— N—甲基苯胺( NPAMPA)的非共振吸收区测量与三阶非线性电极化率 χ[3 ] 有关的非线性折射率 n2 。测得的 n2 值分别为2 .2× 10 -8esu和 1.81× 10 -8esu。根据分子结构特征对这两种三阶非线性光学材料的结构与性能的关系作了讨论。
This work reports the application of picosecond laser and Z-scan technology in two push-pull azo compounds, p-nitrophenylazo-N, N-dimethylaniline (NPADMPA) and p- Non-resonant absorption of methylaniline (NPAMPA) was measured for the nonlinear refractive index n2 associated with the third-order nonlinear susceptibility χ [3]. The measured n2 values were 2.2 × 10 -8 esu and 1.81 × 10 -8 esu, respectively. The relationship between the structure and properties of the two third-order nonlinear optical materials is discussed according to their molecular structure.