Impact of graphene on the polarizability of a neighbour nanoparticle: A dyadic green's function study

B. Amorim, Paulo André Dias Gonçalves, M. I. Vasilevskiy, N. M.R. Peres

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Abstract

We discuss the renormalization of the polarizability of a nanoparticle in the presence of either: (1) a continuous graphene sheet; or (2) a plasmonic graphene grating, taking into account retardation effects. Our analysis demonstrates that the excitation of surface plasmon polaritons in graphene produces a large enhancement of the real and imaginary parts of the renormalized polarizability. We show that the imaginary part can be changed by a factor of up to 100 relative to its value in the absence of graphene. We also show that the resonance in the case of the grating is narrower than in the continuous sheet. In the case of the grating it is shown that the resonance can be tuned by changing the grating geometric parameters.
Original languageEnglish
Article number1158
JournalApplied Sciences
Volume7
Issue number11
Number of pages31
DOIs
Publication statusPublished - 2017

Bibliographical note

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Keywords

  • Dyadic Green's function
  • Graphene
  • Nanoparticle
  • Plasmonics
  • Polarizability
  • Quantum emitter

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