Magnetically Tunable Terahertz Switch and Band-Pass Filter  

作　　者：张会 郭澎 常胜江 袁景和 

机构地区：[1]Institute of Modern Optics, Nankai University, Tianjin 300071 . [2]Institute of Science and Technology for Opto-Electron Information, Yantai University, Yantai 264005

出　　处：《Chinese Physics Letters》2008年第11期3898-3900,共3页中国物理快报（英文版）

基　　金：Supported by the National Basic Research Programme of China under Grant No 2007CB310403, the Nation Natural Science Foundation of China under Grant No 60772105 and 10704043, and the Key Programme of the Applied Basic Research of Tianjin under Grant No 7JCZDJC05500.

摘　　要：A novel design of a tunable terahertz switch and band-pass filter using liquid-crystal-filled photonic crystal waveguide is demonstrated. The effects of magnetic field on the photonic bandgaps and transmitting properties of a THz wave are investigated by using the plane wave expansion method and finite difference time domain method. The efficient photonic bandgap tuning is predicted such that the two-dimensional liquid-crystal-filled photonie crystal waveguide can serve as a switch and continuously tunable band-pass filter with controlling of the magnetic field.A novel design of a tunable terahertz switch and band-pass filter using liquid-crystal-filled photonic crystal waveguide is demonstrated. The effects of magnetic field on the photonic bandgaps and transmitting properties of a THz wave are investigated by using the plane wave expansion method and finite difference time domain method. The efficient photonic bandgap tuning is predicted such that the two-dimensional liquid-crystal-filled photonie crystal waveguide can serve as a switch and continuously tunable band-pass filter with controlling of the magnetic field.

关 键 词：the power-law exponents PRECIPITATION durative abrupt precipitation change 

分 类 号：O46[理学—电子物理学]