Terahertz generation from graphene surface plasmon polaritons excited by an electron beam

Authors

Tao Zhao, University of Electronic Science and Technology of China
Min Hu, University of Electronic Science and Technology of China
Renbin Zhong, University of Electronic Science and Technology of China
Sen Gong, University of Electronic Science and Technology of China
C Zhang, University of WollongongFollow
Shenggang Liu, University of Electronic Science and Technology of China

RIS ID

117664

Publication Details

Zhao, T., Hu, M., Zhong, R., Gong, S., Zhang, C. & Liu, S. (2017). Terahertz generation from graphene surface plasmon polaritons excited by an electron beam. 2017 42nd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) (pp. 1-2). United States: IEEE.

Abstract

A physical mechanism is presented which can generate coherent and tunable terahertz (THz) radiation. Due to the dramatical lifting of SPPs energy, the dispersion can cross the light line, thus, the SPPs excited by an moving electron beam can be transformed into THz radiation. The radiation power density is enhanced nearly three orders, up to 10⁵ W/cm². The radiation frequency can be widely tuned by adjusting the beam energy and chemical potential. This mechanism could provide a promising way for developing room temperature, tunable, coherent and intense THz radiation sources to cover the whole THz band.