Enhanced Terahertz Coherent Smith-Purcell Radiation by Quartz Grating on the Structure
Paper ID : 1216-ICNS
Kamran Hosseini *
Faculty of Electrical & Computer Engineering/ University of Tabriz/ Tabriz/ Iran
The Smith-Purcell radiation (SPR) is mainly used to emit microwave radiation at optical frequency. It has recently become an attractive candidate for Terahertz radiation. This paper introduces a mechanism to enhance the coherent Smith-Purcell Radiation at terahertz frequencies using grating structures simulations. The proposed mechanism is designed with a grating on top of the commonly used structures to improve its performance. The radiation frequency is ≅0.92THz, which could be obtained by using an electron beam with energy 50keV, and a current 1000mA. Electron beam moving between two gratings with a period of 173 µm, the width of 62 µm, and grooves depth 100µm. The results show that the top grating can greatly enhance the SPR. Furthermore, one may utilize this effect to design a well-set and powerful THz radiation source. the radiation field intensity shows a significant enhancement compared with that of a conventional Smith-Purcell radiation. The work is promising for developing efficient on-chip THz radiation sources and boosts advanced THz applications such as communications, multifrequency imaging, and beam diagnostics, etc.
Quartz grating, Evanescent wave, Dispersion relation, Smith Purell
Status : Abstract Accepted (Poster Presentation)