Tunable surface plasmon polaritons in the graphene and metamaterials structures

Dielectric/graphene/dielectric/metamaterials (MMs) structures are proposed to explore the properties of surface plasmon polaritons (SPPs). It is shown that p- and s-polarized SPPs can be observed in the terahertz frequency region in these structures. In addition, the existence regions, dispersion relations, and excitation of SPPs by attenuated total reflection technique can be controlled by changing graphene conductivity via the chemical doping or gate voltage, the parameters of MMs, and the component of structures. Tunable p- and s-polarized SPPs propagating along the graphene sheet and MMs may exhibit large propagation distances, low loss, and other advantages. (C) 2015 Optical Society of America