Epsilon-near-zero behavior from plasmonic Dirac point: Theory and realization using two-dimensional materials

Marios Mattheakis, Constantinos A. Valagiannopoulos, Efthimios Kaxiras

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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 structural 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 two-dimensional 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.

Original languageEnglish
Article number201404
JournalPhysical Review B
Volume94
Issue number20
DOIs
Publication statusPublished - 2016

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ASJC Scopus subject areas

  • Condensed Matter Physics

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