A novel polarizer based on directional coupler and surface plasmon polaritons  

作　　者：周阔 杨俊波 杨建坤 李修建 贾辉 刘菊 邹德滨 徐佳 廖家莉 衣文军 

机构地区：[1]College of Science,National University of Defense Technology

出　　处：《Optoelectronics Letters》2013年第6期430-433,共4页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.60907003,61070040 and 61107005);the Program for New Century Excellent Talents in University

摘　　要：A novel polarizer with a silver nanoribbon added into a traditional waveguide directional coupler is designed to realize the polarized output of TE mode.A high extinction ratio can be obtained because of the selectivity of surface plasmon polaritons(SPPs)on polarization.The effects of the polarizer parameters on coupling efficiency and extinction ratio are discussed.Simulation results indicate that the coupling efficiency for TE mode can reach about 95%,but only 3% for TM mode,with the extinction ratio of TE mode about 15 dB when the light wavelength is 1550 nm.The polarizer may have potential applications in photonic integrated circuits and quantum information technology.A novel polarizer with a silver nanoribbon added into a traditional waveguide directional coupler is designed to realize the polarized output of TE mode. A high extinction ratio can be obtained because of the selectivity of surface plasmon polaritons （SPPs） on polarization. The effects of the polarizer parameters on coupling efficiency and extinction ratio are discussed. Simulation results indicate that the coupling efficiency for TE mode can reach about 95%, but only 3% for TM mode, with the extinction ratio of TE mode about 15 dB when the light wavelength is 1550 nm, The polarizer may have potential applications in photonic integrated circuits and quantum information technology.

关 键 词：表面等离子体激元 波导定向耦合器 偏光片 极化 TE模式 量子信息技术 耦合效率 偏振镜 

分 类 号：TN622[电子电信—电路与系统] TH74[机械工程—光学工程]