锗薄膜透射光学二次谐波研究

Transmitted Second-Harmonic Generation Through Germanium Thin Film

本文采用固定入射角，改变入射光偏振方位角的方法从实验上研究了锗薄膜的透射光学二次谐波产生及其变化规律．并从理论上推导了产生透射二次谐波的表达式。最后拟合求得描述面谐波电流的唯象参数ａ．

Quantitative measurements of transmitted second harmonic generation (TSHG) through the germanium thin film versus the angle of Polarization of incident light from the interface between germanium film and K9 glass are presented. We calculated the intensity of TSHG by the boundary conditions and sipe′S hydrodynamics model, and found that the phenomenological parameter “a” which estimates the size of this normal components of the harmonic current has varying value with angle of incidence.