1. Low-loss terahertz waveguide with InAs-graphene-SiC structure.
- Author
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De-Gang Xu, Yu-Ye Wang, Hong Yu, Jia-Qi Li, Zhong-Xiao Li, Chao Yan, Hao Zhang, Peng-Xiang Liu, Kai Zhong, Wei-Peng Wang, and Jian-Quan Yao
- Subjects
SUBMILLIMETER waves ,NONLINEAR waves ,OPTOELECTRONICS ,THEORY of wave motion ,ELECTRIC properties of graphene ,OPTICAL properties of graphene ,FINITE element method ,MATHEMATICAL models - Abstract
We demonstrate a low-loss terahertz waveguide based on the InAs-graphene-SiC structure. By analyzing the terahertz waveguide proposed in this paper, we can obtain that it is the characteristic of a low transmission loss coefficient (α
loss ≈ 0.55 dB/m) for fundamental mode (LP01 ) when the incident frequency is larger than 3.0 THz. The critical radii of the inside and outside cylinders have been found for the high-quality transmission. The large inside radius and the high transmission frequency result in a flat transmission loss coefficient curve. As a strictly two-dimensional material, the double graphene surface rings perform better to improve the quality of transmission mode. These results provide a new idea for the research of the long-distance THz waveguide. [ABSTRACT FROM AUTHOR]- Published
- 2014
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