Abstract
We predict unprecedentedly large values of the energy-transfer rate between an optical emitter and a layer of periodically doped graphene. The transfer exhibits divergences at photon frequencies corresponding to the Van Hove singularities of the plasmonic band structure of the graphene. In particular, we find flat bands associated with regions of vanishing doping charge, which appear in graphene when it is patterned through gates of spatially alternating signs, giving rise to intense transfer rate singularities. Graphene is thus shown to provide a unique platform for fast control of optical energy transfer via fast electrostatic inhomogeneous doping.
Highlights
Plasmons can interact strongly with light, leading to large electromagnetic field enhancement and concentration of optical energy
The energy transferred from an optical emitter to a neighboring plasmon can be either re-radiated or inelastically absorbed by the plasmonic material
The wavelength of graphene plasmons is considerably reduced with respect to the freespace light wavelength, which results in large local density of optical states (LDOS) values and a significant increase in the interaction with nearby optical emitters compared to conventional plasmonic materials [13]
Summary
Plasmons can interact strongly with light, leading to large electromagnetic field enhancement and concentration of optical energy. The optical excitations of extended, homogeneously doped graphene can be represented as a function of parallel wave vector k and energy of the incident light as shown in figure 1(a).
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