THz Frequency Modulation by Filamentary Plasma Grating
| Autor: | Min Li, Heping Zeng, Shuai Yuan |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Electron density
Materials science genetic structures business.industry Terahertz radiation Physics::Optics 02 engineering and technology Plasma Electron Grating 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics Protein filament Optics Physics::Plasma Physics Ionization 0103 physical sciences Electrical and Electronic Engineering 010306 general physics 0210 nano-technology business Frequency modulation |
| Zdroj: | IEEE Journal of Selected Topics in Quantum Electronics. 23:1-4 |
| ISSN: | 1558-4542 1077-260X |
| Popis: | The frequency of terahertz pulse induced by dual-color laser–induced plasma filament was measured at different positions of the filament to analyze terahertz generation processes. It was experimentally observed that the most broad frequency bandwidth was attained at the tail of laser-induced plasma filament and more higher frequency components were generated under the intervention of filamentary plasma grating, which was attributed to the increased peak electron density from inelastic collisional ionization, while another infrared pulse was focused on the plasma grating to reaccelerate preformed electrons. The results demonstrated that the electron reacceleration process played an important role in determining terahertz frequency bandwidth. |
| Databáze: | OpenAIRE |
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