Impact of Graphene on the Polarizability of a Neighbour Nanoparticle: A Dyadic Green's Function Study
نویسندگان
چکیده
We discuss the renormalization of the polarizability of a nanoparticle in the presence 1 of either (i) a continuous graphene sheet or (ii) a plasmonic graphene grating, taking into account 2 retardation effects. Our analysis demonstrates that the excitation of surface plasmon-polaritons 3 in graphene produces a large enhancement of the real and imaginary parts of the renormalized 4 polarizability. We show that the imaginary part can be changed by a factor of up to 100 relatively to 5 its value in the absence of graphene. We also show that the resonance in the case of the grating is 6 narrower than in the continuous sheet. In the case of the grating it is shown that the resonance can be 7 tuned by changing the grating geometric parameters. 8
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