Title :
Enhancement of terahertz Smith-Purcell radiation by dielectric loaded grating
Author :
Miaomiao Cao ; Wenxin Liu ; Yong Wang ; Ke Li
Author_Institution :
Key Lab. of High Power Microwave Sources & Technol., Inst. of Electron., Beijing, China
Abstract :
In this paper, a dielectric loaded grating is proposed to enhance the Smith-Purcell (SP) radiation at terahertz frequencies. By using two-dimensional particleincell (PIC) code, the radiation power of dielectric loaded grating with different currents is simulated. The results show that compared with the metal grating, the dielectric loaded grating can decrease the threshold current and improve the radiation power.
Keywords :
dielectric materials; diffraction gratings; terahertz waves; 2D PIC code; SP radiation; backward-wave oscillator; dielectric loaded grating; metal grating; radiation power; terahertz Smith-Purcell radiation enhancement; terahertz frequency; threshold current; two-dimensional particle-in-cell code; Dielectrics; Dispersion; Electron beams; Gratings; Load modeling; Metals; Threshold current; Smith-Purcell radiation; dielectric loaded grating; particle-in-cell code; radiation power;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2015 IEEE International
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7109-1
DOI :
10.1109/IVEC.2015.7223841
