光折变晶体的光衍射机制研究  

The Study of Light-Induced Diffraction in Photo-Refractive Crystals

作　　者：黄伟[1] 魏京花[1] 

机构地区：[1]北京建筑工程学院基础部,北京100044

出　　处：《北京建筑工程学院学报》2002年第1期77-79,共3页Journal of Beijing Institute of Civil Engineering and Architecture

基　　金：北京建筑工程学院基础科研基金资助项目

摘　　要：本文研究了光折变晶体的自衍射光斑 ,它是入射光束及其在晶体后表面的反射光束与由晶体缺陷所致散射光的简并四波混频过程 ,其锥角由位相匹配条件△ K =0确定 ,并可用Ewald球作图法解出。Self-diffraction cones in photo-refractive materials are studied in this paper. They are the degenerate four-wave mixing process, consisting of the incident light beam, the light beam reflected by the crystal back surface and the scattering light beam induced by the crystal defects. The cone apex angles are determined by the phase matching △=0 and explained by the Ewald sphere construction. The results indicate that the reflected light beam contributes to self-diffraction light.

关 键 词：光折变晶体 简并四波混频 自衍射光 散射光 

分 类 号：O721[理学—晶体学]