各向同性介质界面本征模分析  

Surface modes at the interface of two isotropic mediums

作　　者：罗杰[1] 须萍[1] 

机构地区：[1]苏州大学物理科学与技术学院,江苏苏州215006

出　　处：《大学物理》2012年第4期12-14,共3页College Physics

基　　金：江苏省高校自然科学基金项目(10KJB140007)资助

摘　　要：分析了两个各向同性材料界面处的本征模,从另一个角度来分析解释了布儒斯特定律.当入射光与界面处的表面模匹配时,入射光的能量就会全部转移到界面的本征场上,如果电磁波在折射介质中为行波,界面的本征场又会在折射介质中激发新的电磁波,形成透射波,也就是布儒斯特定律描述的横电波或者横磁波的全透射现象,这也可以看作是一种光学共振现象.横磁波的全透射现象往往出现在两个具有相同磁导率的介质的界面处,而横电波的全透射现象则往往出现在两个具有相同介电常数的介质的界面处.Surface modes at the interface of two isotropic mediums are investigated and the law of Brewster is analyzed in another aspect.When the incident lights match the surface modes at the interface,the energy of incident lights will transfer to the eigen states at the interface.If the electromagnetic fields in the refractive medium have propagating modes,the surface modes will generate new propagating electromagnetic waves in the refractive medium,forming transmission waves with all the energy of incident lights.This phenomenon of total transmission has been described by the Brewster law,and this can also be viewed as a behavior of optical resonance.The total transmission of transverse magnetic or transverse electric fields is always observed at the interface of two isotropic mediums with the same permeability or permittivity.

关 键 词：界面本征模 布儒斯特定律 光学共振 

分 类 号：O436.3[机械工程—光学工程]