Graphene, plasmons and transformation optics
File(s)
Accepted version
Supporting information
Author(s)
Arroyo Huidobro, P
Kraft, M
Ren, K
Maier, SA
Pendry, J
Type
Journal Article
Abstract
Here we study subwavelength gratings for coupling into graphene plasmons by means of an an-
alytical model based on transformation optics that is not limited to very shallow gratings. We
consider gratings that consist of a periodic modulation of the charge density in the graphene sheet,
and gratings formed by this conductivity modulation together with a dielectric grating placed in
close vicinity of the graphene. Explicit expressions for the dispersion relation of the plasmon po-
laritons supported by the system, and re
ectance and transmittance under plane wave illumination
are given. We discuss the conditions for maximising the coupling between incident radiation and
plasmons in the graphene, finding the optimal modulation strength for a conductivity grating.
alytical model based on transformation optics that is not limited to very shallow gratings. We
consider gratings that consist of a periodic modulation of the charge density in the graphene sheet,
and gratings formed by this conductivity modulation together with a dielectric grating placed in
close vicinity of the graphene. Explicit expressions for the dispersion relation of the plasmon po-
laritons supported by the system, and re
ectance and transmittance under plane wave illumination
are given. We discuss the conditions for maximising the coupling between incident radiation and
plasmons in the graphene, finding the optimal modulation strength for a conductivity grating.
Date Issued
2016-04-01
Date Acceptance
2015-11-03
Citation
Journal of Optics, 2016, 18 (4)
ISSN
2040-8978
Publisher
IOP Publishing
Journal / Book Title
Journal of Optics
Volume
18
Issue
4
Copyright Statement
©2016 IOP Publishing Ltd.
Sponsor
The Leverhulme Trust
Engineering & Physical Science Research Council (EPSRC)
Grant Number
F/07 058/BK
EP/L024926/1
Subjects
Science & Technology
Physical Sciences
Optics
graphene plasmonics
subwavelength gratings
surface plasmons
transformation optics
conformal mapping
LIGHT
TERAHERTZ
GEOMETRY
0205 Optical Physics
0906 Electrical And Electronic Engineering
Publication Status
Published
Article Number
044024