Graphene plasmon polaritons: Substrate effects and nonlocal response
Abstract
This paper is withdrawn by the authors. We theoretically examine graphene plasmon polaritons (GPP) supported by a sheet of graphene sandwiched between two dielectric media. The influence of the dielectric environment on GPP's is studied within local and nonlocal descriptions of graphene's conductivity. We demonstrate that a local-response approximation invariably leads, counter-intuitively, to a substrate-independent surface plasmon frequency. On the other hand, the nonlocal description of the electron gas allows the presence of non-vertical inter-band transitions which changes the results qualitatively: the GPP's now depend on the surroundings, and the singularity in the local GPP dispersion relation is removed.
Cite
@article{arxiv.1206.4466,
title = {Graphene plasmon polaritons: Substrate effects and nonlocal response},
author = {Thomas Christensen and Antti-Pekka Jauho and N. Asger Mortensen},
journal= {arXiv preprint arXiv:1206.4466},
year = {2012}
}
Comments
This paper has been withdrawn by the authors due to artifacts in the modelling of large-k response