Tunable and angle-insensitive plasmon resonances in graphene ribbon arrays with multispectral diffraction response

Abstract

Plasmon resonances in graphene ribbon arrays are investigated numerically by means of the Finite Element Method. Numerical analysis shows that a series of multipolar resonances take place when graphene ribbon arrays are illuminated by a TM polarized electromagnetic wave. Moreover, these resonances are angle-independent, and can be tuned greatly by the width and the doping level of the graphene ribbons. Specifically, we demonstrate that for graphene arrays with several sets of graphene ribbons, which have different widths or doping levels, each of these multipolar resonances will be split into several ones. In addition, as plasmon resonances can confine electromagnetic field at the ribbon edges, graphene ribbons with different widths or doping levels offer intriguing application for electrically tunable spectral imaging.

Scattering and absorption of terahertz waves by a free-standing infinite grating of graphene strips: analytical regularization analysis

“…an electrically resistive sheet characterized with frequency-dependent complex valued resistivity. Graphene is also famous for its strong interaction with electromagnetic waves of the THz frequency range [4][5][6][7][8][9][10][11][12][13]. Thanks to the properties of its conductivity a sheet of graphene is able to support delocalized surface plasmon waves at frequencies two orders of magnitude lower than the noble metals.…”

Tunable absorption in graphene-based hyperbolic metamaterials for mid-infrared range

“…4). Hence, n g of the GHMMs is insensitive to incident angle, which offered intriguing application for electrically tunable spectral imaging [34]. Thus, we can design a periodic structure with GHMMs and investigate the absorption while changing incident angle and polarizations.…”

A Tunable Plasmonic Refractive Index Sensor with Nanoring-Strip Graphene Arrays

“…. Where n g is the doping level of graphene, ν F is the graphene Fermi velocity and µ ≈ 10000cm 2 V -1 s -1 is the measured dc mobility [36], similar to that used in [33,34,37,38].…”