Graphene/liquid crystal based terahertz phase shifters

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 maximu...

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Bibliographic Details
Published in:arXiv.org 2013-09
Main Authors: Wu, Yang, Ruan, Xuezhong, Chen, Chih-Hsin, Young, Jun Shin, Lee, Youngbin, Niu, Jing, Liu, Jingbo, Chen, Yuanfu, Kun-Lin, Yang, Zhang, Xinhai, Jong-Hyun Ahn, Yang, Hyunsoo
Format: Article
Language:English
Subjects:
Controllability
Electric potential
Electrical resistivity
Electrodes
Graphene
Liquid crystals
Phase shifters
Terahertz frequencies
Transmittance
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1309.1595