复合型二维光子晶体的带隙展宽特性  

Bandgap extension of two-dimensional composite-photonic-crystals

作　　者：王身云[1] 刘少斌[2] 杨建平[3] 

机构地区：[1]南昌大学物理系,南昌330031 [2]南京航空航天大学信息科学与技术学院,南京210016 [3]湖北民族学院物理系,湖北恩施445000

出　　处：《光通信技术》2007年第9期62-64,共3页Optical Communication Technology

基　　金：国家自然科学基金项目(批准号:60471002)资助。

摘　　要：选用时域有限分方法(FDTD)分析光子晶体带隙结构。选择两种不同晶格常数的二维光子晶体构成复合型二维光子晶体,计算了复合型光子晶体和组合光子晶体在近红外频段的带隙结构,结果表明,复合型二维光子晶体在近红外波频段的禁带宽度明显大于组合光子晶体禁带宽度。通过改变复合光子晶体的介电常数,实现其禁带向高频区或低频区移动。The band gaps of triangular composite-photonic-crystals are studied by FDTD method. The two-dimensional composite-photonic-crystals are formed with two different crystal constants.We caculated the band structure of composite-photonic-crystal and composite photonic crystals. The results show that the band gaps are wider than that of both composite photonic crystals at near infrared wave. Then we can set different dielectric constant of photonic crystal to remove the band gaps towards high-frequency region or low-frequency region.

关 键 词：复合型光子晶体 带隙结构 时域有限差分方法 

分 类 号：O431[机械工程—光学工程]