窄光束在掠反射条件下的特性  

Characteristic of a narrow beam under the grazing reflection condition

作　　者：余辉[1] 江晓清[1] 杨建义[1] 戚伟[1] 王明华[1] 

机构地区：[1]浙江大学信息与电子工程学系,杭州310027

出　　处：《物理学报》2008年第7期4208-4213,共6页Acta Physica Sinica

基　　金：国家自然科学基金重点项目(批准号:60436020);国家重点基础研究发展计划(973)项目(批准号:2007CB613405)资助的课题~~

摘　　要：在掠入射条件下,由于部分平面波分量无法直接入射到反射面,从而不能按照常规方式被反射和透射.而反射透射模式的逆过程被用来描述非直接入射的这部分平面波分量与反射区的相互作用.基于这两个模式,采用平面波展开法导出了窄光束掠入射条件下出射光的场分布,理论计算结果与采用BPM方法的模拟值完全一致.For the grazing incidence of a narrow beam, a part of plane wave components can not reach the reflecting interface directly, so they can not be reflected and transmitted in the traditional way. The inverse mode of reflection and transmission is proposed in this paper to describe the interaction between the non-incident plane wave components and the reflection region. Based on the two modes, the plane wave expansion method is utilized to derive exact distribution of the output optical field. Theoretical calculation agrees well with the simulation result which employs the BPM algorithm.

关 键 词：掠反射 平面波展开法 导波模式 光波导开关 

分 类 号：O435.1[机械工程—光学工程]