二维正方柱结构光子晶体禁带的研究  

Research of band gap of two-dimensional photonic crystal with square rods

作　　者：王媛媛[1] 宋健[2] 黄益强[1] 李田赫[1] 张振宇[1] 何晓东[1] 

机构地区：[1]吉林大学通信工程学院,吉林长春130012 [2]吉林大学电子科学与工程学院,吉林长春130012

出　　处：《激光与红外》2009年第9期969-973,共5页Laser & Infrared

基　　金：吉林科技发展计划项目(No.20050524);长春市国际合作科技计划项目(No.2007114)资助

摘　　要：利用平面波展开法通过计算机模拟仿真对二维正方排列介质方柱和空气方柱结构以及三角排列介质方柱和空气方柱结构进行了禁带研究。研究发现:这四种二维光子晶体结构都存在完全禁带。介质方柱结构具有较大的TM禁带,而空气方柱结构具有较大的TE禁带。当介质方柱宽度增大时,禁带中心频率均向低频移动,而当空气方柱宽度增加时,禁带中心频率均向高频移动。当增大材料折射率时,禁带中心频率均向低频移动。对于空气方柱结构,应该选取高折射率材料,以提高完全禁带的带隙率。The band gap of square dielectric rods of two-dimensional photonic crystal in square lattice and the band gap of square air rods of two-dimensional photonic crystal in triangular lattice by computer simulation were studied with the plane wave method. Results show that：there is complete band gap in the four structures of two-dimensional photonic crystal. There is big TM band gap in square dielectric rods, and big TE band gap in square air rods. The middle frequencies of the band gap will reduce with the increase of the width of the square dielectric rods, but the middle frequencies of the band gap will increase with the increase of the width of the square air rods. When increasing the material refractive index, the middle frequencies of the band gap will reduce. To the square air rods, we should choose the high refractive index material to enhance the band gap radio of the complete band gap.

关 键 词：光子晶体 二维光子晶体 平面波展开法 禁带结构 完全禁带 

分 类 号：O431[机械工程—光学工程]