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Surface Plasmon Resonant THz Wave Transmission on Carbon Nanotube Film |
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| Authors: | Yue Wang Xuan Wang Qun Wu Xun-jun He Tai-long Gui Yi-Jing Tong |
| Institution: | 1. Department of Electronic Science and Technology, Harbin University of Science and Technology, Harbin, 150080, China 2. Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin, 150080, China 3. School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin, 150001, China 4. Department of Materials Physics, Harbin University of Science and Technology, Harbin, 150080, China |
| Abstract: | The properties of the terahertz resonant surface plasmons wave on the carbon nanotube film and dielectric interface have been investigated. As a first step towards engineering terahertz SPPs-like surface modes, we present a computer experiment to demonstrate that the carbon nanotube film surface can also be employed to concentrate and guide the terahertz SPPs wave. The carbon nanotube film is modeled in an experimentally realizable geometry. It is shown that a unique electromagnetic surface mode in terahertz region can be supported along the carbon nanotube film/dielectric interface when the free-space broadband terahertz pulse is incident on the carbon nanotube film with subwavelength gratings. Comparing with noble metals, plasmonic nano-structure materials based on carbon nanotube film offer a potentially more versatile approach to engineering tightly confined surface modes in the THz regime. |
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