A. Sahoo, Chan-Shan Yang, Chun-Ling Yen, Hung-Chun Lin, Yu-Jen Wang, O. Wada, C. Pan
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Liquid Crystal Based Terahertz Phase Shifter with Bi-Layer Structure
We propose and demonstrate a liquid crystal (LC) based terahertz phase shifter with a thick (550 μm in total) bi-layer LC cell structure incorporating a thin transparent polymeric intermediate layer. The present phase shifter exhibited remarkable performance improvement. The phase shift increased from 94o to 111o; threshold and drive voltages decreased from 2.2 VRMS to 1 VRMS and from 10 VRMS to 8.4 VRMS, respectively, in comparison with those for single-layer cell structure.