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Broadband tunable THz absorption with singular graphene metasurfaces

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Title: Broadband tunable THz absorption with singular graphene metasurfaces
Authors: Galiffi, E
Pendry, JB
Huidobro, PA
Item Type: Journal Article
Abstract: By exploiting singular spatial modulations of the graphene conductivity, we design a broadband, tunable THz absorber whose efficiency approaches the theoretical upper bound for a wide absorption band with a fractional bandwidth of 185%. Strong field enhancement is exhibited by the modes of this extended structure, which is able to excite a wealth of high-order surface plasmons, enabling deeply subwavelength focusing of incident THz radiation. Previous studies have shown that the conductivity can be modulated at GHz frequencies, which might lead to the development of efficient high-speed broadband switching by an atomically thin layer.
Issue Date: 11-Jan-2018
Date of Acceptance: 11-Jan-2018
URI: http://hdl.handle.net/10044/1/57942
DOI: https://dx.doi.org/10.1021/acsnano.7b07951
ISSN: 1936-0851
Publisher: American Chemical Society
Start Page: 1006
End Page: 1013
Journal / Book Title: ACS Nano
Volume: 12
Issue: 2
Copyright Statement: © 2018 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, after peer review and technical editing by the publisher. To access the final edited and published work see https://dx.doi.org/10.1021/acsnano.7b07951
Sponsor/Funder: Commission of the European Communities
Commission of the European Communities
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
University Of California
The Royal Society
Commission of the European Communities
Particle Physics and Astronomy Research Council (PPARC)
University Of California
Engineering & Physical Science Research Council (EPSRC)
Kodak Ltd
Engineering & Physical Science Research Council (E
Commission of the European Communities
Engineering & Physical Science Research Council (EPSRC)
The Royal Society
The Leverhulme Trust
European Office Of Aerospace Research & Developmen
The Leverhulme Trust
Defence Science and Technology Laboratory (DSTL)
Gordon and Betty Moore Foundation
Royal Commission for the Exhibition of 1851
Engineering & Physical Science Research Council (EPSRC)
The Royal Society
Commission of the European Communities
Gordon and Betty Moore Foundation
ESPRC
Funder's Grant Number: IST-2001-35511
NMP4-CT-2003-505699
GR/S49544/01
GR/S49537/01
0205-G-CB259
502011.k526/KK
IST-2001-35511
PPA/A/S/1999/00358
959636
EP/D503795/1
Studentship - Mr D Millson
EP/D063329/1
213390
EP/G031819/1
NF082241
F/07 058/BF
FA8655-09-1-3074
F/07 058/BK
DSTLX1000064076
BB00099823
RF447/2012
EP/L024926/1
NF150755
702525
00009581
ESPRC (EP/G036888/1)
Keywords: broadband absorber
metamaterials
singular structures
surface plasmons
terahertz
tunable metasurfaces
MD Multidisciplinary
Nanoscience & Nanotechnology
Publication Status: Published
Conference Place: United States
Appears in Collections:Condensed Matter Theory
Physics
Faculty of Natural Sciences



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