Surface plasmons in graphene and carbon nanotubes
| Autor: | Riichiro Saito, M. Shoufie Ukhtary |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Nanotube
Materials science business.industry Graphene Terahertz radiation Surface plasmon Physics::Optics Fermi energy 02 engineering and technology General Chemistry Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention law Physics::Atomic and Molecular Clusters Optoelectronics General Materials Science 0210 nano-technology business Absorption (electromagnetic radiation) Plasmon |
| Zdroj: | Carbon. 167:455-474 |
| ISSN: | 0008-6223 |
| Popis: | Physics and applications of surface plasmon in graphene and carbon nanotubes are reviewed. The surface plasmon in graphene can be excited by THz electro-magnetic wave. Since the surface plasmon in graphene propagates sufficiently long ( > 10 μ m) on the surface, we can fabricate a new THz device. The surface plasmon in doped carbon nanotube is observed as a new absorption peak in infrared region. The origin of the surface plasmon in nanotube is understood by inter-subband plasmon whose energy is scaled by the Fermi energy and diameter of the nanotube. In order to understand physics of the surface plasmon, we first discuss resonant conditions of surface plasmon for graphene and nanotube by calculating energy dispersions of the surface plasmon. Then we show some experimental techniques to excite the surface plasmon, in which energy-momentum matching is achieved between a photon and a plasmon. For discussing propagation of the surface plasmon, we define characteristic lengths of propagation and confinement for a surface plasmon. Finally, we give a perspective for the applications of the surface plasmon in graphene and nanotubes. |
| Databáze: | OpenAIRE |
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