一维光子晶体MgF_2/CdSe及其缺陷结构的反射性质  

Doped modes of MgF_2/CdSe one-dimensional photonic crystal with Ta_2O_5 in visible region

作　　者：杨帆[1] 唐吉玉[1] 杨述东[1] 林邦惜[1] 程健[1] 刘巍[1] 

机构地区：[1]华南师范大学物理与电信工程学院,广东广州510006

出　　处：《激光与红外》2011年第11期1253-1257,共5页Laser & Infrared

摘　　要：将MgF2/CdSe构建一维光子晶体,引入了缺陷层Ta2O5,利用传输矩阵法,分别分析了电磁波在三种结构中的带隙结构,探明了各种参量对带隙的影响。计算结果表明:MgF2/CdSe一维光子晶体结构在可见光波段具有良好的反射性质,缺陷Ta2O5的引入能够达到增加其带隙,得到缺陷模的目的,并且通过调节入射角和结构参量,能够控制缺陷模的位置,有望制成可见光波段的滤波器。MgF2 and CdSe are used to construct one-dimensional photonic crystals,and the defect layer is also introduced.The mode of electromagnetic waves in three band structures and the influence of parameters on the band gap are introduced and verified by calculation with the transfer matrix method.It is shown that there is a good reflection characteristics of MgF2/CdSe one-dimensional photonic crystal in visible band.The defect layer Ta2O5 can widen the band gap and get a good defect mode of transmission.When incident angle and thickness of Ta2O5 layers are regulated properly,the defect mode′s position can be controlled.The structure can be applied to make filter in visible band.

关 键 词：光子晶体 缺陷层 传输矩阵法 可见光波段 

分 类 号：O73[理学—晶体学]