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Tunable surface waves at the interface separating different graphene-dielectric composite hyperbolic metamaterials

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Title: Tunable surface waves at the interface separating different graphene-dielectric composite hyperbolic metamaterials
Authors: Gric, T
Hess, O
Item Type: Journal Article
Abstract: Despite the fact that metal is the most common conducting constituent element in the fabrication of metamaterials, one of the advantages of graphene over metal is that its conductivity can be controlled by the Fermi energy. Here, we theoretically investigate multilayer structures comprising alternating graphene and dielectric layers as a class of hyperbolic metamaterials for THz frequencies based on a general simple model of the graphene and the dielectric layers. By employing a method of matching the tangential components of the electrical and magnetic fields, we derive the relevant dispersion relations and demonstrate that tuning can be achieved by modifying the Fermi energy. Moreover, tunability of the graphene-dielectric heterostructures can be enhanced further by changing either the thickness of the dielectric layers or the number of graphene sheets employed. Calculated dispersion relations, propagation lengths of plasmon modes in the system are presented. This allows us to characterize and categorize the modes into two groups: FerrelBerreman modes and surface plasmon polaritons.
Issue Date: 15-May-2017
Date of Acceptance: 2-Jan-2017
URI: http://hdl.handle.net/10044/1/52446
DOI: https://dx.doi.org/10.1364/OE.25.011466
ISSN: 1094-4087
Publisher: Optical Society of America (OSA)
Start Page: 11466
End Page: 11476
Journal / Book Title: Optics Express
Volume: 25
Issue: 10
Copyright Statement: © 2017 Optical Society of America
Keywords: Science & Technology
Physical Sciences
Optics
NEGATIVE REFRACTION
RADIATIVE DECAY
OPTICS
ABSORPTION
PLASMONS
EPSILON
FILMS
LIGHT
0205 Optical Physics
1005 Communications Technologies
0906 Electrical And Electronic Engineering
Publication Status: Published
Appears in Collections:Condensed Matter Theory
Physics
Faculty of Natural Sciences