双振子模型手性分子介质的二次谐波理论  

Second harmonic theory of two coupled oscillators in chiral molecular media

作　　者：郑仰东[1] 李俊庆[1] 李淳飞[1] 

机构地区：[1]哈尔滨工业大学物理系,哈尔滨150001

出　　处：《物理学报》2003年第2期372-376,共5页Acta Physica Sinica

摘　　要：推导了在二次谐波条件下耦合双振子模型手性分子的一阶超极化率 ,给出了薄膜手性介质的二阶极化率 ,分析了分子的微观参量对二次谐波产生效率的影响 .理论计算所得的偏振旋转角谱和已有的实验结果相符 .We have derived the hyperpolarizability of a chiral molecule from the model of coupled two-oscillators in second-harmonic generation. We gave the susecptibility of a thin film. We discussed the influence of microscopic parameters of a molecule on the efficiency of second-harmonic generation through the relationship of hyperpolarizabilities and susceptibilities, We also have simulated the spectrum of rotational angle of polarization state. Our theoretical results fit the known experimental facts.

关 键 词：双振子模型 手性分子 分子极化率 介质极化率 二次谐波 非线性光学 

分 类 号：O437[机械工程—光学工程]