二维正方晶格光子晶体分束器设计与分析  

Design and analysis of two-dimensional square lattice photonic crystal beam splitter

作　　者：武晴涛 文化锋[1] 王红华 WU Qingtao;WEN Huafeng;WANG Honghua(College of Information Science and Engineering,Ningbo University,Ningbo Zhejiang 315211,China)

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211

出　　处：《光通信技术》2020年第4期40-42,共3页Optical Communication Technology

基　　金：国家自然科学基金(No.61371061)资助;浙江省自然科学基金(LY12F01010)资助;宁波市自然科学基金(No.2016A610060)资助.

摘　　要：光学器件应用于集成光路中尺寸必须足够小,传统耦合分束方式需较长的耦合距离,尺寸不易控制在较小范围内。采用耦合区域增加可变介质柱可以有效减小耦合距离,在完整的光子晶体中引入直波导,并且在直波导的出射端设计成3个波导出射口,其中两侧出射口结构完全相同。利用时域有限差分法分析,结果表明:通过改变直波导间耦合区域的介质柱大小可实现控制光波功率分配的目的,从而实现了波导传播过程的分光比。The size of the optical device used in the integrated optical path must be small enough. The traditional coupling beam splitting method requires a long coupling distance, the size is not easy to control in a small range. The use of a coupling region to increase the variable dielectric column can effectively reduce the coupling distance. Straight waveguides are introduced into the photonic crystals, and the exit ends of the straight waveguides are designed as three wave exit ports, where the exit ports on both sides have the same structure. Using the finite-difference time-domain analysis, the results show that the purpose of controlling the power distribution of light waves can be achieved by changing the size of the dielectric pillars in the coupling region between the straight waveguides, thereby achieving the splitting ratio of the waveguide transmission process.

关 键 词：光子晶体 耦合 分束器 分光比 

分 类 号：TN256[电子电信—物理电子学]