Epsilon-near-zero behavior from plasmonic Dirac point: Theory and realization using two-dimensional materials
Valagiannopoulos, Constantinos A.
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CitationMattheakis, Marios, Constantinos A. Valagiannopoulos, and Efthimios Kaxiras. 2016. “Epsilon-near-Zero Behavior from Plasmonic Dirac Point: Theory and Realization Using Two-Dimensional Materials.” Physical Review B 94 (20). https://doi.org/10.1103/physrevb.94.201404.
AbstractThe 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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