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Title: Graphene/liquid crystal based terahertz phase shifters
Authors: Wu, Y.
Ruan, X.
Chen, C.-H.
Shin, Y.J.
Lee, Y.
Niu, J.
Liu, J.
Chen, Y.
Yang, K.-L.
Zhang, X.
Ahn, J.-H.
Yang, H. 
Issue Date: 9-Sep-2013
Source: Wu, Y., Ruan, X., Chen, C.-H., Shin, Y.J., Lee, Y., Niu, J., Liu, J., Chen, Y., Yang, K.-L., Zhang, X., Ahn, J.-H., Yang, H. (2013-09-09). Graphene/liquid crystal based terahertz phase shifters. Optics Express 21 (18) : 21395-21402. ScholarBank@NUS Repository.
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 μm 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. © 2013 Optical Society of America.
Source Title: Optics Express
ISSN: 10944087
DOI: 10.1364/OE.21.021395
Appears in Collections:Staff Publications

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