Herold M, Schmid W, Vogtmann T, Fischer R, Haarer D, Schwoerer M
Appl Opt. 1995 Feb 20;34(6):996-1002. doi: 10.1364/AO.34.000996.
A simple reflection method that is based on ellipsometry and the electro-optic Pockels and Kerr effects is adapted for the determination of the electro-optic susceptibilities χ((2))(-ω; 0,ω) and χ((3))(-χ; 0, 0, ω). Measurements were made on materials that consist of centrosymmetric molecules like the polydiacetylene poly-(butoxycarbonylmethyleneurethane) (poly-4BCMU) and on a noncentrosymmetric poled sidechain polymer that contains dimethylaminonitrostilbene (ANS). The results are compared with those acquired by other methods (e.g., second-harmonic generation, third-harmonic generation, and degenerate four-wave mixing). Large differences occur, especially for the χ((3)) values. The effects of mechanical strains from electrostatic forces and from the field-dependent change of the absorption are discussed.
一种基于椭圆偏振术以及电光泡克耳斯效应和克尔效应的简单反射方法，被用于测定电光极化率χ((2))(-ω; 0,ω) 和χ((3))(-χ; 0, 0, ω)。对由诸如聚二乙炔聚（丁氧基羰基亚甲基脲）（聚-4BCMU）等中心对称分子组成的材料以及含有二甲基氨基硝基芪（ANS）的非中心对称极化侧链聚合物进行了测量。将结果与通过其他方法（例如二次谐波产生、三次谐波产生和简并四波混频）获得的结果进行了比较。出现了很大差异，尤其是对于χ((3))值。讨论了静电力产生的机械应变以及吸收的场致变化的影响。
