Title :
Electrically controlled room temperature terahertz phase shifter with liquid crystal
Author :
Tsong-Ru Tsai ; Chao-Yuan Chen ; Ru-Pin Pan ; Ci-Ling Pan ; Xi-Cheng Zhang
Author_Institution :
Inst. of Electro-Opt. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
We present the use of electrically controlled birefringence in a nematic liquid crystal cell for phase shifting of electromagnetic waves up to terahertz frequencies. This device was operated at room temperature and a maximum phase shift of 4.07/spl deg/ was demonstrated at 1.07 THz when the interaction length was 38.6 μm. The driving voltage and corresponding field were 176.8 V (rms) and 589.3 V/cm, respectively.
Keywords :
birefringence; liquid crystal devices; nematic liquid crystals; phase modulation; phase shifters; submillimetre wave devices; 1.07 THz; 176.8 V; driving voltage; electrically controlled birefringence; electrically controlled room temperature; electromagnetic wave phase shifting; nematic liquid crystal cell; phase modulation; phase shift; terahertz frequencies; terahertz phase shifter; Birefringence; Dielectrics; Electromagnetic scattering; Frequency; Liquid crystals; Phase modulation; Phase shifters; Strips; Temperature control; Voltage;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2003.819958
