Tunable terahertz plasmon in grating-gate coupled graphene with a resonant cavity<xref ref-type="fn" rid="cpb142016fn1">*</xref>

Tunable terahertz plasmon in grating-gate coupled graphene with a resonant cavity*

Yan Bo^a),^b), Yang Xin-Xin^b), Fang Jing-Yue^a), Huang Yong-Dan^b), Qin Hua^b), Qin Shi-Qiao^c)

Fig.#cod#x00A0;4. a Transmission and reflection spectra simulated by FDTD at f p #cod#x003D;1.95#cod#x00A0;THz, W #cod#x003D;3#cod#x00A0;#cod#x03BC;m, L #cod#x003D;6#cod#x00A0;#cod#x03BC;m, and h Si #cod#x003D;200#cod#x00A0;#cod#x03BC;m. The blue solid and red dashed lines represent transmission and reflection, respectively. b The absolute absorption spectrum A #cod#x003D;1#cod#x2212; T #cod#x2212; R . c Transmission of the device mode without graphene T C , that with graphene T G , and transmission related to the absorption around 1.95#cod#x00A0;THz T C 1#cod#x2212; A . d Simulation of the transverse terahertz electric field upon an incident transverse electric mode at x = W 2 corresponding to the 9th cavity mode j =9.