光子学报, 2015, 44 (8): 0823001, 网络出版: 2015-09-08   

基于空气缺陷的光子晶体可调谐滤波器

Photonic Crystal Tunable Optical Filter Based on Air Defect Layer
温建华 1,2,*张杨 1,2杨毅彪 1,2邓霄 1,2费宏明 1,2陈智辉 1,2
作者单位
1 太原理工大学 物理与光电工程学院
2 新型传感器与智能控制教育部重点实验室, 太原 030024
摘要
采用传输矩阵法分别模拟了缺陷层厚度、入射角度和膜厚微扰的变化对含空气缺陷的一维光子晶体滤波特性的影响.研究表明:对于空气厚度可调结构,在考虑色散的情况下,空气厚度每增加2 nm透射波长相应向长波方向移动约2 nm,二者基本呈1 :1的线性关系;对于入射角度可调结构,与正入射相比较,入射角度从0°到89°变化时,其全角度禁带分别减小了105 nm(TE模)、600 nm(TM模),TM模禁带受角度的变化影响较大;入射角从0°分别变化到16.9°(TE模)、17.0°(TM模)时实现C波段的可调滤波.同一周期内,两种材料的模厚误差的相互弥补,能够实现小范围的膜厚扰动不敏感,缩小实际滤过峰值与理论值的偏差,可降低制备光子晶体的难度.
Abstract
The filtering characteristics of one-dimensional photonic crystal with an air defect layer were investigated using transfer matrix method as the thickness of defect,incident angle and thickness perturbation changing.The studies suggest:For air thickness adjustable structure,considering the dispersion of the materials,the increase of 2 nm for the air thickness makes the transmission peak shift about 2 nm to the long-wave direction,which shows a linear relationship of 1:1;For incident angle adjustable structure,compared with the normal incidence,when the incident angle change from 0° to 89°,the omnidirectional photonic bandgap decrease 105 nm (TE mode)、600 nm (TM mode) respectively;which shows that TM mode band gap are greatly influenced by the change of incident angle;it can realize the tunable filter in C band when the incident angle varies from 0° to 16.9° (TE mode) and 17.0° (TM mode) respectively.In the same period,the mutual remedying of thickness error of two materials can realize insensitivity to thickness perturbation in small range,which can narrow the deviation between the actual peaks and theoretical peaks to reduce the difficulty of the fabrication of photonic crystal.

温建华, 张杨, 杨毅彪, 邓霄, 费宏明, 陈智辉. 基于空气缺陷的光子晶体可调谐滤波器[J]. 光子学报, 2015, 44(8): 0823001. WEN Jian-hua, ZHANG Yang, YANG Yi-biao, DENG Xiao, FEI Hong-ming, CHEN Zhi-hui. Photonic Crystal Tunable Optical Filter Based on Air Defect Layer[J]. ACTA PHOTONICA SINICA, 2015, 44(8): 0823001.

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