Metallic photonic crystals for terahertz tunable filters

被引：10
|
作者：
Fan Fei [1 ]
Chang ShengJiang [1 ]
Hou Yu [1 ]
机构：
[1] Nankai Univ, Inst Modern Opt, Key Lab Opt Informat Sci & Technol, Minist Educ, Tianjin 300071, Peoples R China
来源：
SCIENCE CHINA-INFORMATION SCIENCES | 2012年 / 55卷 / 01期
基金：
中国国家自然科学基金;
关键词：
terahertz; metallic photonic crystals; liquid crystals; filter; WAVE-GUIDE; SWITCH; BANDGAP; PLATE;
D O I：
10.1007/s11432-011-4485-3
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
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.
引用
收藏
页码：72 / 78
页数：7
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