Abstract

A new radiation scheme, which adopts the high-order harmonics of a train of electron bunches to excite the high-order guided mode, is proposed and investigated by numerical simulations. By applying this scheme, the radiation with frequency close to 1 THz is generated from a waveguide with relatively big-size structure, and the bunching frequency is much lower than the radiation frequency. This scheme may offer a promising candidate for practical terahertz source since it breaks the two main bottlenecks of the vacuum electronic devices in the terahertz region: very tiny-size structure and unapproachable electron beam.

© 2015 Optical Society of America

Broad-tunable terahertz source with over-mode waveguide driven by train of electron bunches

Weihao Liu, Yalin Lu, Zhigang He, Weiwei Li, Lin Wang, and Qika Jia
Opt. Express 24(4) 4109-4116 (2016)

Harmonics generation of a terahertz wakefield free-electron laser from a dielectric loaded waveguide excited by a direct current electron beam

Weiwei Li, Yalin Lu, Zhigang He, Qika Jia, and Lin Wang
Opt. Lett. 41(11) 2458-2461 (2016)

Engineering tunable terahertz radiation from an electron bunch using graphene metasurfaces

Limei Qi, MingJing Wu, and Xiaojun Han
Appl. Opt. 61(16) 4773-4778 (2022)

Simulation study of a high-order mode terahertz radiation source based on an orthogonal grating waveguide and multiple sheet electron beams

G. X. Shu, G. Liu, and Z. F. Qian
Opt. Express 26(7) 8040-8048 (2018)

Cascade bunch focusing on chip using terahertz pulses to drive prism arrays

Liwen Zhang, Weihao Liu, Hongliang Xu, Qika Jia, and Yalin Lu
Opt. Lett. 48(10) 2704-2707 (2023)