Terahertz generation from graphene surface plasmon polaritons excited by a cyclotron electron beam
| Autor: | Sen Gong, Shenggang Liu, Ping Zhang, Min Hu, Renbin Zhong, Tao Zhao, Xiaoxing Chen, Chao Zhang |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
business.industry Terahertz radiation Graphene Surface plasmon Cyclotron Physics::Optics 02 engineering and technology Radiation 021001 nanoscience & nanotechnology 01 natural sciences Surface plasmon polariton law.invention Optics law Excited state 0103 physical sciences Optoelectronics 010306 general physics 0210 nano-technology business Plasmon |
| Zdroj: | 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz). |
| Popis: | A novel physical mechanism is reported which can generate coherent and tunable terahertz (THz) radiation. Due to the natural periodicity of 2π of circular cylindrical graphene structure, the surface plasmon polaritions (SPPs), excited by a cyclotron electron beam (CEB), can be transformed into radiation. The radiation density is strongly enhanced over two orders, up to 105 W/cm2. The radiation frequency can be widely tuned by adjusting the beam energy and chemical potential. This mechanism opens a way for developing room temperature, tunable, coherent and intense pulsed or even CW THz radiation sources to cover the whole THz frequency regime. |
| Databáze: | OpenAIRE |
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