Title :
Electrically tunable room-temperature 2π liquid crystal terahertz phase shifter
Author :
Wu, Hsin-Ying ; Hsieh, Cho-Fan ; Tang, Tsung-Ta ; Pan, Ru-Pin ; Pan, Ci-Ling
Author_Institution :
Dept. of Electrophys., Nat. Chiao Tung Univ., Hsinchu, Taiwan
fDate :
7/1/2006 12:00:00 AM
Abstract :
Tunable phase shift up to 360° at 1 THz is demonstrated using electrically controlled birefringence in a vertically aligned nematic liquid crystal (E7) cell, 1.83 mm in thickness. The driving voltage and corresponding field required for a phase shift of 360° at 1 THz are 100 V and 90.5 V/cm, respectively.
Keywords :
birefringence; liquid crystal devices; nematic liquid crystals; optical phase shifters; 1 THz; 1.83 mm; 100 V; 2π liquid crystal phase shifter; 293 to 298 K; birefringence; electrical tuning; nematic liquid crystal cell; room temperature; terahertz phase shifter; tunable phase shift; Birefringence; Liquid crystals; Optical control; Phase shifters; Quantum well devices; Submillimeter wave technology; Thickness control; Tunable circuits and devices; Ultrafast optics; Voltage; Liquid crystal (LC) devices; submillimeter wave phase shifters; tunable circuits and devices; ultrafast optics;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.877579
