1. Graphene/liquid crystal based terahertz phase shifters
- Author
-
Wu, Yang, Ruan, Xuezhong, Chen, Chih-Hsin, Shin, Young Jun, Lee, Youngbin, Niu, Jing, Liu, Jingbo, Chen, Yuanfu, Yang, Kun-Lin, Zhang, Xinhai, Ahn, Jong-Hyun, and Yang, Hyunsoo
- Subjects
Condensed Matter - Materials Science ,Condensed Matter - Mesoscale and Nanoscale Physics ,Physics - Optics - Abstract
Due to its high electrical conductivity and excellent transmittance at terahertz frequencies, graphene is a promising candidate as transparent electrodes for terahertz devices. We demonstrate a liquid crystal based terahertz phase shifter with the graphene films as transparent electrodes. The maximum phase shift is 10.8 degree and the saturation voltage is 5 V with a 50 um liquid crystal cell. The transmittance at terahertz frequencies and electrical conductivity depending on the number of graphene layer are also investigated. The proposed phase shifter provides a continuous tunability, fully electrical controllability, and low DC voltage operation.
- Published
- 2013
- Full Text
- View/download PDF