Metallic photonic crystals for terahertz tunable filters  

作　　者：FAN Fei CHANG ShengJiang HOU Yu 

机构地区：[1]Institute of Modern Optics,Nankai University,Key Laboratory of Optical Information Science and Technology,Ministry of Education,Tianjin 300071,China

出　　处：《Science China(Information Sciences)》2012年第1期72-78,共7页中国科学（信息科学）（英文版）

基　　金：supported by the National Basic Research Program of China(Grant No.2007CB310403);the National Natural Science Foundation of China(Grant No.61171027);the Natural Science Foundation of Tianjin(Grant No.10JCZDJC15200);the Doctoral Fund of Ministry of Education of China(Grant No.20090031110033)

摘　　要：We have investigated the photonic band gap and transmission properties of metallic photonic crystals （PCs） filled with liquid crystal （LC） in the terahertz region by using the finite element method and the finite- difference time-domain method. The calculations on the LC-filled metallic PC and metallic PC waveguide demonstrated that they can realize low-loss broadband terahertz tunable filters, which have a tunable range of about 110 GHz and extinction ratio larger than 35 dB. Moreover, the 3 dB bandwidths of the filters keep constant. The designed filters based on the metallic PC can greatly improve the performances in terms of loss, bandwidth and tunable region compared to those based on the LC-filled dielectric PC.We have investigated the photonic band gap and transmission properties of metallic photonic crystals （PCs） filled with liquid crystal （LC） in the terahertz region by using the finite element method and the finite- difference time-domain method. The calculations on the LC-filled metallic PC and metallic PC waveguide demonstrated that they can realize low-loss broadband terahertz tunable filters, which have a tunable range of about 110 GHz and extinction ratio larger than 35 dB. Moreover, the 3 dB bandwidths of the filters keep constant. The designed filters based on the metallic PC can greatly improve the performances in terms of loss, bandwidth and tunable region compared to those based on the LC-filled dielectric PC.

关 键 词：TERAHERTZ metallic photonic crystals liquid crystals FILTER 

分 类 号：O734[理学—晶体学] TN713[电子电信—电路与系统]