Epsilon-Near-Zero behavior from plasmonic Dirac point: theory and realization using two-dimensional materials
Abstract
The electromagnetic response of a two-dimensional metal embedded in a periodic array of a dielectric host can give rise to a plasmonic Dirac point that emulates Epsilon-Near-Zero (ENZ) behavior. This theoretical result is extremely sensitive to tructural features like periodicity of the dielectric medium and thickness imperfections. We propose that such a device can actually be realized by using graphene as the 2D metal and materials like the layered semiconducting transition-metal dichalcogenides or hexagonal boron nitride as the dielectric host. We propose a systematic approach, in terms of design characteristics, for constructing metamaterials with linear, elliptical and hyperbolic dispersion relations which produce ENZ behavior, normal or negative diffraction.
Cite
@article{arxiv.1610.03439,
title = {Epsilon-Near-Zero behavior from plasmonic Dirac point: theory and realization using two-dimensional materials},
author = {Marios Mattheakis and Constantinos A. Valagiannopoulos and Efthimios Kaxiras},
journal= {arXiv preprint arXiv:1610.03439},
year = {2016}
}