A tunable terahertz radiation source based on a surface wave transformed into Cherenkov radiation in a subwavelength array
| Autor: | Renbin Zhong, Shenggang Liu, Xiao-xing Cheng, Sen Gong, Ping Zhang, Min Hu, Tao Zhao |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Acoustics and Ultrasonics business.industry Terahertz radiation Physics::Optics 02 engineering and technology Dielectric Electron Radiation 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Optics Transition radiation Surface wave 0103 physical sciences Cathode ray Optoelectronics 010306 general physics 0210 nano-technology business Cherenkov radiation |
| Zdroj: | Journal of Physics D: Applied Physics. 49:145302 |
| ISSN: | 1361-6463 0022-3727 |
| DOI: | 10.1088/0022-3727/49/14/145302 |
| Popis: | A tunable THz radiation source based on the Cherenkov radiation mechanism is proposed. In the structure of a dielectric medium rod covered by subwavelength metal ring array, the surface wave is excited by electron bunch on the subwavelength metal ring array, and then transformed into Cherenkov radiation in the dielectric medium rod. The working frequency is determined by the intersection of the surface wave dispersion curve and electron beam line, and could be tuned by adjusting the beam energy. The source, which is compact and operable at room temperature, generates radiation with peak power from microwatts up to milliwatts. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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