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https://scholarbank.nus.edu.sg/handle/10635/89031
| 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. | 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/10635/89031 | ISSN: | 10944087 |
| Appears in Collections: | Staff Publications |
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