对称型正负交替一维光子晶体超窄带滤波器  

Symmetrical Structural One-dimensional Photonic Crystal Super Narrow-band Filter With Positive-negative Index Alternant Multilayer

作　　者：罗仁华[1] 梁瑞生[1] 韦中超[1] 杨广[1] 刘颂豪[1] 

机构地区：[1]华南师范大学信息光电子科技学院光子信息技术广东省高校重点实验室,广东广州510006

出　　处：《激光与红外》2008年第10期1015-1018,共4页Laser & Infrared

基　　金：国家“973”计划项目(No.2007CB307001)资助

摘　　要：构造了(AB)N1(BA)N2对称型正负折射率交替一维光子晶体,并利用传输矩阵法进行数值模拟,研究了这种正负折射率交替一维光子晶体的能带结构与各参数之间的关系。结果表明:当两种材料的光学厚度相同时,该结构光子晶体比传统的光子晶体的带隙大得多,且在主禁带内有极窄的透射带。并利用此透射带,设计了一种在红外波段1550nm窗口3dB带宽可以做到0.000001nm以下,窗口内透过率接近100%的超窄带滤波器。该结构的光子晶体可以用作超窄带滤波器,有望在光通信超密集波分复用系统中获得广泛应用。Constructing the Symmetrical Structural One-dimensional Photonic Crystal in the form of （AB）^N1 （BA）^N2. By using the transfer matrix method, the relations between the optical properties of this one-dimensional photonic band-gap structure with positive-negative index alternant muhilayer and its parameters are analyzed. The results show that the photonic crystals with positive-negative index ahernant muhilayer have wider photonic band-gap which is dif- ferent from the case of traditional photonic crystals with narrow transmission bands when the two layers have the same optical thickness. There are extremely narrow transmission peaks in the main photonic band-gap. Numerical investigation shows that the structure investigated can be served as a super narrow pass band optical filter. The 3dB pass band obtained can be less than 0. 000001 nm near the infrared 1550nm, and the optical transmission in the pass band is almost 100%. This kind of photonic crystal super narrow band optical filter may find applications in super dense wavelength division multiplexing （SDWDM） for optical communication system.

关 键 词：光子晶体 传输矩阵 对称结构 正负折射率交替 超窄带滤波 

分 类 号：O431[机械工程—光学工程]