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Letter. Omnidirectional absorption in nanostructured metal surfaces

Teperik, T.V., García de Abajo, F.J., Borisov, A.G., Abdelsalam, M., Bartlett, P.N., Sugawara, Y. and Baumberg, J.J. (2008) Letter. Omnidirectional absorption in nanostructured metal surfaces Nature Photonics, 2, (5), pp. 299-301. (doi:10.1038/nphoton.2008.76).

Record type: Article

Abstract

Light absorbers available at present provide far from optimal black-body performance. The need for more efficient absorbers is particularly acute on the microscale, where they can play a significant role in preventing crosstalk between optical interconnects, and also as thermal light-emitting sources.

Several efforts have been made in this context to achieve near-total but directionally dependent absorption using periodic grating structures. However, the ability to absorb light completely for any incident direction of light remains a challenge. Here we show that total omnidirectional absorption of light can be achieved in nanostructured metal surfaces that sustain localized optical excitations.

The effect is realized over a full range of incident angles and can be tuned throughout the visible and near-infrared regimes by scaling the nanostructure dimensions. We suggest that surfaces displaying omnidirectional absorption will play a key role in devising efficient photovoltaic cells in which the absorbed light leads to electron–hole pair production.

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More information

e-pub ahead of print date: 29 April 2008
Published date: May 2008
Keywords: transmission, coatings, light-absorption, photonic crystals, gratings, silver, plasmons, films
Organisations: Chemistry, Electrochemistry

Identifiers

Local EPrints ID: 145047
URI: http://eprints.soton.ac.uk/id/eprint/145047
ISSN: 1749-4885
PURE UUID: 6787eb1c-cece-4f75-b4a3-cf2cba395adb
ORCID for P.N. Bartlett: ORCID iD orcid.org/0000-0002-7300-6900

Catalogue record

Date deposited: 15 Apr 2010 14:50
Last modified: 18 Jul 2017 23:07

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Contributors

Author: T.V. Teperik
Author: F.J. García de Abajo
Author: A.G. Borisov
Author: M. Abdelsalam
Author: P.N. Bartlett ORCID iD
Author: Y. Sugawara
Author: J.J. Baumberg

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