Title :
High-harmonic terahertz radiation from prebunched electron beam in the tapered grating structure
Author :
Xin, Zhang Ya ; Liang, D. ; Cong, Z.Y. ; Hao, L.W. ; Ping, Z. ; Liu, S.G.
Author_Institution :
Terahertz Sci. & Technol. Res. Center, Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
Based on the mechanism of incoherent diffraction radiation excited by an electron bunch in the waveguide with periodic structure, this paper presents the concept of coherent THz radiation from the high-harmonic component of modulated free-electron beam in a tapered two-asymmetric grating structure. The results show in this mechanism 0.43THz 3-harmonic radiation can be generated with the efficiency 0.5%.
Keywords :
diffraction gratings; electron beams; optical waveguides; particle beam bunching; periodic structures; terahertz wave generation; 3-harmonic radiation generation; coherent THz radiation; electron bunch; frequency 0.43 THz; high-harmonic component; high-harmonic terahertz radiation; incoherent diffraction radiation; modulated free-electron beam; periodic structure; prebunched electron beam; tapered two-asymmetric grating structure; waveguide; Cavity resonators; Current density; Diffraction; Dispersion; Electron beams; Laser beams; Periodic structures;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on
Conference_Location :
Wollongong, NSW
Print_ISBN :
978-1-4673-1598-2
Electronic_ISBN :
2162-2027
DOI :
10.1109/IRMMW-THz.2012.6380487
