Graphene/liquid crystal based terahertz phase shifters

Please use this identifier to cite or link to this item: https://doi.org/10.1364/OE.21.021395

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
Citation:	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. https://doi.org/10.1364/OE.21.021395
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
URI:	http://scholarbank.nus.edu.sg/handle/10635/56154
ISSN:	10944087
DOI:	10.1364/OE.21.021395
Appears in Collections:	Staff Publications

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