Voltage-controlled liquid-crystal terahertz phase shifter and quarter-wave plate

被引：147

作者：

Hsieh, CF ^{[1
]}

Pan, RP

Tang, TT

Chen, HL

Pan, CL

机构：

[1] Natl Chiao Tung Univ, Dept Electrophys, Hsinchu 30010, Taiwan

[2] Natl Chiao Tung Univ, Dept Photon, Hsinchu 30010, Taiwan

[3] Natl Chiao Tung Univ, Inst Electroopt Engn, Hsinchu 30010, Taiwan

来源：

OPTICS LETTERS | 2006年 / 31卷 / 08期

关键词：

D O I：

10.1364/OL.31.001112

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Phase shift exceeding pi/2 at 1 THz is demonstrated by using electrically controlled birefringence in a homeotropically aligned nematic liquid crystal (E7) cell, 570 mu m in thickness. The driving voltage required for a phase shift of 90 degrees is 125 V (rms). We demonstrate that the phase shifter works as an electrically switchable quarter-wave plate at I THz. The device can also be used as an electrically tuned phase compensator around the quarter-wave point near 1 THz. (c) 2006 Optical Society of America.

引用

页码：1112 / 1114

页数：3

共 18 条

[1]

Chandrasekhar S., 1992, LIQUID CRYSTAL

[2] 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

[3] 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

[4]

DEGENNES PG, 1983, PHYS LIQUID CRYSTALS

[5] Materials for terahertz science and technology [J].

Ferguson, B ;

Zhang, XC .

NATURE MATERIALS, 2002, 1 (01) :26-33

[6] FAR-INFRARED TIME-DOMAIN SPECTROSCOPY WITH TERAHERTZ BEAMS OF DIELECTRICS AND SEMICONDUCTORS [J].

GRISCHKOWSKY, D ;

KEIDING, S ;

VANEXTER, M ;

FATTINGER, C .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 1990, 7 (10) :2006-2015

[7]

Hecht E., 2017, Optics, V5th ed.

[8] ORIENTATION OF LIQUID-CRYSTALS BY SURFACE COUPLING AGENTS [J].

KAHN, FJ .

APPLIED PHYSICS LETTERS, 1973, 22 (08) :386-388

[9] Terahertz phase modulator [J].

Kersting, R ;

Strasser, G ;

Unterrainer, K .

ELECTRONICS LETTERS, 2000, 36 (13) :1156-1158

[10] Room-temperature operation of an electrically driven terahertz modulator [J].

Kleine-Ostmann, T ;

Dawson, P ;

Pierz, K ;

Hein, G ;

Koch, M .

APPLIED PHYSICS LETTERS, 2004, 84 (18) :3555-3557

← 1 2 →