Terahertz and infrared surface plasmon-polaritons in double-graphene layer structures

2nd Russia-Japan-USA Symposium on the Fundamental and Applied Problems of Terahertz Devices and Technologies

Svintsov, Dmitry^1 ; Vyurkov, Vladimir^1 ; Ryzhii, Victor^2,3 ; Otsuji, Taiichi^3

Institute of Physics and Technology, Russian Academy of Science, Russia^1

Research and Educational Center Photonics and Infrared Technology, Bauman Moscow State Technical University, Russia^2

Research Institute of Electrical Communication, Tohoku University, Japan^3

关键词: Free path;    Graphene layers;    Spatial dispersion;    Surface plasmon polaritons;    Tera Hertz;    Voltage tunability;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/486/1/012023/pdf
DOI  :  10.1088/1742-6596/486/1/012023

来源: IOP

【 摘 要 】

Spectra and damping of surface plasmon-polaritons (SPPs) in double graphene layer structures are studied theoretically. The SPPs in those structures exhibit a remarkable voltage tunability of velocity and damping, inherent to gated graphene. The spatial dispersion of conductivity significantly augments the free path and cutoff frequency of SPPs. It is also pointed out to the effect of photon-assisted interlayer tunneling, which leads to a substantial decrease in SPP damping.