Liquid-crystal-based terahertz tunable Lyot filter

被引：147
作者：
Chen, CY
Pan, CL
Hsieh, CF
Lin, YF
Pan, RP
机构：
[1] Natl Chiao Tung Univ, Dept Photon, Inst Electroopt Engn, Hsinchu 30010, Taiwan
[2] Natl Chiao Tung Univ, Dept Electrophys, Hsinchu 30010, Taiwan
来源：
APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 10期
关键词：
D O I：
10.1063/1.2181271
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A two-element tunable Lyot filter operating in the terahertz (THz) frequency range is demonstrated. The central bandpass frequency of the filter can be continuously tuned from 0.388 to 0.564 THz (a fractional tuning range of 40%) using magnetically controlled birefringence in nematic liquid crystals. The transmission bandwidth is 0.1 THz and the insertion loss of the present device is 8 dB due to the scattering of LC molecules in the thick LC cells. This filter can be operated at room temperature. (c) 2006 American Institute of Physics.
引用
收藏
页数：3
相关论文
共 25 条
[1]  
[Anonymous], 2003, SENSING TERAHERTZ RA
[2]   Design and measurement of a bandpass filter at 300 GHz based on a highly efficient binary grating [J].
Biber, S ;
Hofmann, A ;
Schulz, R ;
Collischon, M ;
Weinzierl, J ;
Schmidt, LP .
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2004, 52 (09) :2183-2189
[3]   A TUNABLE NARROW-BAND OPTICAL FILTER [J].
BILLINGS, BH .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA, 1947, 37 (10) :738-746
[4]   Magnetically tunable room-temperature 2π liquid crystal terahertz phase shifter [J].
Chen, CY ;
Hsieh, CF ;
Lin, YF ;
Pan, RP ;
Pan, CL .
OPTICS EXPRESS, 2004, 12 (12) :2625-2630
[5]   Room temperature terahertz phase shifter based on magnetically controlled birefringence in liquid crystals [J].
Chen, CY ;
Tsai, TR ;
Pan, CL ;
Pan, RP .
APPLIED PHYSICS LETTERS, 2003, 83 (22) :4497-4499
[6]   ON THE CALCULATION OF THE DIELECTRIC-RELAXATION TIMES OF A NEMATIC LIQUID-CRYSTAL FROM THE NON-INERTIAL LANGEVIN EQUATION [J].
COFFEY, WT ;
KALMYKOV, YP .
LIQUID CRYSTALS, 1993, 14 (04) :1227-1236
[7]  
DEGENNES PG, 1983, PHYS LIQUID CRYSTALS
[8]   Transmittance of a tunable filter at terahertz frequencies [J].
Drysdale, TD ;
Gregory, IS ;
Baker, C ;
Linfield, EH ;
Tribe, WR ;
Cumming, DRS .
APPLIED PHYSICS LETTERS, 2004, 85 (22) :5173-5175
[9]   Materials for terahertz science and technology [J].
Ferguson, B ;
Zhang, XC .
NATURE MATERIALS, 2002, 1 (01) :26-33
[10]   ORIENTATION OF LIQUID-CRYSTALS BY SURFACE COUPLING AGENTS [J].
KAHN, FJ .
APPLIED PHYSICS LETTERS, 1973, 22 (08) :386-388
123