Abstract-Electrically tunable liquid crystal terahertz phase shifter driven with polymer transparent electrodes

Yan Du,   Hao Tian,   Xuan Cui,   Hao Wang and   Zhongxiang Zhou  

J. Mater. Chem. C, 2016, Accepted Manuscript

DOI: 10.1039/C6TC00842A
http://pubs.rsc.org/en/Content/ArticleLanding/2016/TC/C6TC00842A#!divAbstract

The use of DMSO-doped poly (3,4-ethylenedioxythiophene):poly (4-styrenesulfonate) (PEDOT:PSS) thin films produced by spin coating as transparent electrodes for a liquid crystal terahertz (THz) phase shifter is reported. Transmittance of this newly proposed transparent electrode is as high as ~90%. The phase shifter provides continuous tunability, full electrical controllability, and low-voltage operation at THz frequencies. A maximum phase shift of 129.4° at 1.17 THz is achieved in a 500 μm-thick cell when the driving voltage is as low as 6.7 V (rms).