CAREER: Doped Graphene: a Transformative Paradigm for Plasmonics and

Doped graphene, a one-atom-thick but highly conductive sheet, provides us with an unprecedented platform to explore surface plasmon and two-dimensional optics in a regime that can hardly be obtained with noble metals or conventional electron gases. Theoretical calculations show that graphene surface plasmon (transverse magnetic mode) shows extraordinarily tight confinement and short wavelength. Graphene also supports a new type of surface electromagnetic wave (transverse electric mode). Furthermore, as a material with tunable permittivity, graphene holds promise for integrated twodimensional active photonic devices. Despite the great potential of graphene, there is clearly a lack of direct experimental confirmation of surface plasmon as well as demonstration of active plasmonic devices.