Long-Range Surface Plasmon-Polaritons in Bilayer Graphene as Efficient Thermal Energy Carries

Bilayer graphene (BLG) is a stack of two single-layer graphene sheets and it has unique electronic and optical properties that make it suitable for studying surface plasmon-polaritons (SPPs). In bilayer graphene, the SPPs can be excited at the interface between the bilayer graphene and a dielectric material. The excitation of SPPs in bilayer graphene is different from that in a metal, as it is based on the coupling of light to the oscillations of the charge carriers in the graphene, rather than to the oscillations of free electrons in a metal. The unique electronic properties of bilayer graphene allow for the engineering of the SPP dispersion relation, providing a way to tailor the SPP wavevector, frequency, and confinement.