二维正方晶格各向异性光子晶体完全禁带中缺陷模的计算和分析  

A FDTD method for calculating defect modes in a two dimensional photonic crystalconsisting of anisotropic cylinders

作　　者：吴海华[1] 邵先亦[2] 庄飞[1] 

机构地区：[1]杭州师范大学物理系,杭州310036 [2]台州学院物理系,浙江临海317000

出　　处：《齐齐哈尔大学学报（自然科学版）》2009年第1期43-47,共5页Journal of Qiqihar University(Natural Science Edition)

基　　金：浙江省自科学基金(Y404355);浙江省科技厅配套项目(0424XP15)

摘　　要：采用FDTD(时域有限差分法)方法,通过微调中心点缺陷半径Rd以及中心附近对称位置的点缺陷半径Rn,计算了二维正方晶格各向异性碲圆柱光子晶体的点缺陷模。计算结果表明,H极化缺陷模共振频率对于缺陷半径的变化不太敏感,得到了完全禁带中缺陷模频率与点缺陷半径和多点缺陷半径之间的有规律的变化关系。A finite differece in time domain （ FDTD ） method is employed to calculate defect modes in a two dimensional photonic crystal consisting of anisotropic cylinders of tellurium. To obtain a defect mode inside the complete band gap by adjusting the radius Ra of the central defect and radius R. of the neighboring defects. The results showed that the defect modes for the H-polarization are not sensitive to R. and Ra, while the resonance frequency for defect mode varies regularly as Rn and Rd changes.

关 键 词：光子禁带 点缺陷 时域有限差分法 缺陷模 

分 类 号：O484.4[理学—固体物理]