二维光子晶体分频特性效率分析  

Frequency-Dividing Efficiency of 2D Photonic Crystals

作　　者：王身云[1] 刘少斌[2] 

机构地区：[1]南昌大学理学院,南昌330031 [2]南京航空航天大学信息科学与技术学院,南京210016

出　　处：《光学与光电技术》2007年第6期9-11,共3页Optics & Optoelectronic Technology

基　　金：国家自然科学基金(60471002)资助项目

摘　　要：采用FDTD方法分析了二维光子晶体的分频特性,在二维光子晶体内引入线缺陷后形成波导,在波导附近引入点缺陷可将能在波导中传播的某些特定频率的电磁波分离出去;特定频率取决于点缺陷的性质;设计了一种多个相同性质的点缺陷与波导耦合的分频模型,计算结果表明,这种模型的分频效率明显高于单个点缺陷与波导耦合的模型,为制作光子晶体分频器件提供了理论依据。Frequency-dividing characteristics of photonic crystals are studied by using the finite-difference time-domain method （FDTD）. Photonic crystals waveguide is formed when line defects are induced into photonic crystals. If there is the point defect near a waveguide, some special frequency wave will be separated from the waveguide. The special frequency depends on the performance of the point defects. A frequency-dividing model of several same point defects coupled waveguide with is designed. The results show that the frequency-dividing efficiency is obviously higher than that of the model of a single point defect coupled with waveguide. It provides the theoretical basis for designing the photonic crystal splitters.

关 键 词：FDTD方法 光子晶体 分频效率 

分 类 号：O431.2[机械工程—光学工程]