摘要
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 （αloss 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 fiat 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.
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 （αloss 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 fiat 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.
基金
Project supported by the National Basic Research Program of China(Grant No.2014CB339802)
the National High Technology Research and Development Program of China(Grant No.2011AA010205)
the National Natural Science Foundation of China(Grant Nos.61107086 and 61172010)
the Natural ScienceFoundation of Tianjin,China(Grant Nos.11JCYBJC01100 and 13ZCZDSF02300)
the Specialized Research Fund for the Doctoral Program of Higher Education of China(Grant No.20120032110053)
the THz Science and Technology Foundation of China Academy of Engineering Physics(Grant Nos.CAEPTHZ201201 and CAEPTHZ201304)
