TY - JOUR
T1 - Epsilon-near-zero behavior from plasmonic Dirac point
T2 - Theory and realization using two-dimensional materials
AU - Mattheakis, Marios
AU - Valagiannopoulos, Constantinos A.
AU - Kaxiras, Efthimios
N1 - Publisher Copyright:
© 2016 American Physical Society.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2016
Y1 - 2016
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.94.201404
DO - 10.1103/PhysRevB.94.201404
M3 - Article
AN - SCOPUS:84995538671
VL - 94
JO - Physical Review B
JF - Physical Review B
SN - 1098-0121
IS - 20
M1 - 201404
ER -