作　　者： ; ; ; ;

机构地区： 中国科学院上海光学精密机械研究所

出　　处： 《光学学报》 2004年第12期1701-1704,共4页

摘　　要： 为分析非常偏振光在晶体表面的能量损耗,给出一种求解反射率和透射率的方法,即根据电磁场的边值关系以及晶体的双折射和双反射现象,求解晶体光轴在入射面内时,非常偏振光从各向同性介质入射到晶体和从晶体出射到各向同性介质两种情况的反射率和透射率的方法,并给出反射率和透射率的解析解,同时得到对于晶体光轴在入射面内的情况,光轴的取向对非常偏振光反射率的大小几乎没有影响,但对产生全反射的临界角θc影响较大的结论。实验上用LiNbO3晶体验证了非常偏振光从各向同性介质入射到晶体时的反射率公式。求解方法简单实用,所给的表达式具有一般性,可以直接使用。 For analyzing the energy loss of an extraordinary beam at crystal surfaces, a simple method is proposed to calculate the corresponding reflectivity and transmissivity. According to the boundary relations of the electromagnetic field, and based on the phenomena of double refraction and double reflection in crystals, the reflectivity and transmissivity are deduced at boundary when an extraordinary beam is incident from an isotropic medium upon a crystal or from a crystal to an isotropic medium with optical axis in the incident plane. The change of the direction of the optic axis has influence on the critical angle θc but little influence on reflectivity, The reflectivity for e-beam incident upon a crystal from an isotropic medium is experimentally verified with LiNbO3 crystal. The formulate given in this paper are general and representative.

关 键 词： 物理光学 反射率 透射率 双折射 菲涅耳反射

领　　域： [机械工程] [理学] [理学]