Complete optical absorption in periodically patterned graphene
Complete optical absorption in periodically patterned graphene
We demonstrate that 100% light absorption can take place in a single patterned sheet of doped graphene. General analysis shows that a planar array of small particles with losses exhibits full absorption under critical-coupling conditions provided the cross section of each individual particle is comparable to the area of the lattice unit cell. Specifically, arrays of doped graphene nanodisks display full absorption when supported on a substrate under total internal reflection and also when lying on a dielectric layer coating a metal. Our results are relevant for infrared light detectors and sources, which can be made tunable via electrostatic doping of graphene.
Thongrattanasiri, Sukosin
24d4678f-b0c0-4591-b9ed-9554d6181065
Koppens, Frank
2757e54a-5383-4d0d-bc28-c30f5e54646b
García de Abajo, F.
e0e4fb1e-d807-4c42-b5de-0d9d92942dca
27 January 2012
Thongrattanasiri, Sukosin
24d4678f-b0c0-4591-b9ed-9554d6181065
Koppens, Frank
2757e54a-5383-4d0d-bc28-c30f5e54646b
García de Abajo, F.
e0e4fb1e-d807-4c42-b5de-0d9d92942dca
Thongrattanasiri, Sukosin, Koppens, Frank and García de Abajo, F.
(2012)
Complete optical absorption in periodically patterned graphene.
Physical Review Letters, 108 (4), [047401].
(doi:10.1103/PhysRevLett.108.047401).
Abstract
We demonstrate that 100% light absorption can take place in a single patterned sheet of doped graphene. General analysis shows that a planar array of small particles with losses exhibits full absorption under critical-coupling conditions provided the cross section of each individual particle is comparable to the area of the lattice unit cell. Specifically, arrays of doped graphene nanodisks display full absorption when supported on a substrate under total internal reflection and also when lying on a dielectric layer coating a metal. Our results are relevant for infrared light detectors and sources, which can be made tunable via electrostatic doping of graphene.
This record has no associated files available for download.
More information
Published date: 27 January 2012
Organisations:
Optoelectronics Research Centre
Identifiers
Local EPrints ID: 337810
URI: http://eprints.soton.ac.uk/id/eprint/337810
PURE UUID: 2007c62a-0a14-43d7-913a-747b5a351202
Catalogue record
Date deposited: 03 May 2012 10:41
Last modified: 14 Mar 2024 10:58
Export record
Altmetrics
Contributors
Author:
Sukosin Thongrattanasiri
Author:
Frank Koppens
Author:
F. García de Abajo
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics