具有缺陷态的二维光子晶体通讯波长滤波器的结构优化设计  

Structural design of communication filters using two-dimensional photonic crystals with defect modes

作　　者：郑渝[1] 徐群和[1] 李书平[1] 康俊勇[1] 

机构地区：[1]福建省半导体材料及应用重点实验室厦门大学物理系,福建厦门361005

出　　处：《福州大学学报（自然科学版）》2007年第S1期19-23,共5页Journal of Fuzhou University(Natural Science Edition)

基　　金："863"计划资助项目(2006AA03A110);基础科研资助项目(A1420060155);国家自然科学基金资助项目(60336020);厦门市科技计划资助项目(3502Z20063001)

摘　　要：采用平面波展开法分别模拟设计了理想和带有点缺陷与线缺陷的二维光子晶体能带结构;进一步构建具有点缺陷和线缺陷联合结构滤波器,通过改变介质折射率、介质柱半径和背景材料折射率,使点缺陷的滤波中心波长处于光子晶体禁带中的1.31和1.55μm两个主要通迅波长.同时,采用时域有限差分算法模拟滤波器的传播和滤波频谱特性,结果显示,该结构滤波器的滤波频谱中心波长刚好分别位于1.31和1.55μm,透射峰尖锐,显现出优良的滤波特性.The band structures of 2D photonic crystals without and with point and line defects were simulated using plane wave expansion method.By calculating different index and radius of lattices,the 2D photonic crystal structures combining a point and a line defects were successfully designed to have modes in 1.31 and 1.55μm.The optical transmission and leaching characteristics of the designed structures were simulated by finite-difference time-domain(FDTD) method.The results show that the leaching spectra are sha...

关 键 词：光子晶体 光子禁带 缺陷态 滤波器 结构设计 

分 类 号：TN713[电子电信—电路与系统]