Terahertz broadband polarizer using bilayer subwavelength metal wire-grid structure on polyimide film

作     者：吴晓 李化月 梁士雄 刘建军 韩张华 洪治 

作者机构：Centre for THz ResearchChina Jiliang University Science and Technology on ASIC LaboratoryHebei Semiconductor Research Institute 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2015年第13卷第1期

页      面：78-81页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：partly supported by the NationalNatural Science Foundation of China under Grant Nos.61377108 and 61107042 

主　　题：THz Terahertz broadband polarizer using bilayer subwavelength metal wire-grid structure on polyimide film 

摘      要：A tcrahcrtz （THz） broadband polarizer using bilayer subwavelength metal wire-grid structure on both sides of polyimide fihn is simulated by the finite-difference time-domain method. We amdyze tile effect of film thickness, material loss, and lateral shift between two metallic gratings on the performance of the THz polarizer. Bilayer wire-grid polarizers are fabricated by a simple way of laser induced and non-electrolytic plating with copper. The THz time-domain spectroscopy measurements show that in 0.2 1.6 THz frequency range, the extinction ratio is better than 45 dB, the average extinction ratio reaches 53 dB, and the transmittance exceeds 67%, which shows great advantage over conventional single wire-grid THz polarizer.