基于长方形缺陷体的二维光子晶体多通道滤波和分束器的特性研究  

Study of the Multi-Channel Filtering and Beam Splitting Characters of Two-Dimensional Photonic Crystal Based on the Rectangular Defects

作　　者：杨国建[1] 冯帅[1] 王义全[1] 李予喜[1] 代传港[1] 金超群[1] 

机构地区：[1]中央民族大学理学院,北京100081

出　　处：《光学学报》2012年第F12期281-285,共5页Acta Optica Sinica

基　　金：国家自然科学基金（10904176）、国家985工程计划（98507-012009）、国家211工程计划和大学生研究计划训练项目（BEIJ2012110002,URTP2012110003）资助课题.

摘　　要：基于二维正方晶格光子晶体，利用时域有限差分方法理论研究了长方形缺陷体的谐振频率随其自身大小和排列方向变化的规律。在其他参数不变的条件下，通过改变长方形缺陷体的排列方向以及输入输出波导与缺陷之间的耦合，获得了高效率的双通道二维光子晶体滤波器，以及同时具有滤波和分束两种特性的三通道光学器件，其中中间的一个波导可以对两个谐振频率实现通过，两侧的两个输出波导分别对不同的频率实现选择性透过。该种器件综合考虑了光子晶体波导的分束特性和缺陷对不同频率的选择特性，有望在未来复杂全光集成回路中得到实际应用。Based on the two-dimensional square-lattice photonic crystal, the variation of the rectangular defect＇s resonant frequency to the size and orientation of the rectangle is studied with the finite-different time-domain method. With other parameters kept constant, a high-efficient double-channel filter and a three-channel optical device with both functions of frequency filtering and beam splitting, where the central branch guide allows two resonant frequencies to propagate and the other two branch guides allow their respective frequencies to propagate, are obtained by adjusting the rectangular defect＇s orientation and the coupling between the input and output waveguides and the defect. This kind of device considers both the beam splitting and the wavelength filtering characters, and may be actually applied in the future complex all-optical integrated circuits.

关 键 词：光学器件 光子晶体 分支波导 滤波器 

分 类 号：O436[机械工程—光学工程] TN713[理学—光学]