Figure 1
From: Hybridization of graphene-gold plasmons for active control of mid-infrared radiation
Hybridization between graphene and gold plasmons. (a) Design of the hybrid gold-graphene metasurface device. The thickness of the SiO2 dielectric spacer is 90 nm. The graphene layer is placed between the gold rods and the SiO2 spacer. (b) Microscopic depiction of the hybridization phenomenon. The incident light is polarized along the long (vertical) axis of the gold rod. The near-field around the gold rods couples to dark plasmons in graphene along the horizontal direction. The gold and graphene plasmons hybridize, forming two new modes, whose energies \(\hbar {\omega }_{-}\) and \(\hbar {\omega }_{+}\) depend on the charge distribution on graphene. (c) Net charge density of antisymmetric (\({\omega }_{+}\)) and symmetric (\({\omega }_{-}\)) modes. The red and blue clouds represent opposite charges.
