Optical response of tunable terahertz plasmon in a grating-gated graphene transistor

Yan Bo^{1, 2, 3}, Fang Jingyue^{2, †}, Qin Shiqiao², Liu Yongtao³, Chen Li¹, Chen Shuang¹, Li Renbing¹, Han Zhen¹

(color online) (a) Schematic structure of the device and the coordinate notation for transmission measurement. (b) Measured Raman spectrum of the transferred monolayer graphene on top of the Si/SiO₂ substrate. (c) The optical photo of the grating gate.