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Sub-wavelength focusing meta-lens

Sub-wavelength focusing meta-lens
Sub-wavelength focusing meta-lens
We show that a planar plasmonic metamaterial with spatially variable meta-atom parameters can focus transmitted light into sub-wavelength hot-spots located beyond the near-field of the metamaterial. By nano-structuring a gold film we created an array of meta-lenses generating foci of 160 nm (0.2 lambda) in diameter when illuminated by a wavelength of 800 nm. We attribute the occurrence of sub-wavelength hotspots beyond the near field to the phenomenon of superoscillation.
1094-4087
7577-7582
Roy, Tapashree
094726f3-177b-468a-be7a-f299d6c4fef5
Rogers, Edward T.F.
b92cc8ab-0d91-4b2e-b5c7-8a2f490a36a2
Zheludev, Nikolay I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Roy, Tapashree
094726f3-177b-468a-be7a-f299d6c4fef5
Rogers, Edward T.F.
b92cc8ab-0d91-4b2e-b5c7-8a2f490a36a2
Zheludev, Nikolay I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

Roy, Tapashree, Rogers, Edward T.F. and Zheludev, Nikolay I. (2013) Sub-wavelength focusing meta-lens. Optics Express, 21 (6), 7577-7582. (doi:10.1364/OE.21.007577).

Record type: Article

Abstract

We show that a planar plasmonic metamaterial with spatially variable meta-atom parameters can focus transmitted light into sub-wavelength hot-spots located beyond the near-field of the metamaterial. By nano-structuring a gold film we created an array of meta-lenses generating foci of 160 nm (0.2 lambda) in diameter when illuminated by a wavelength of 800 nm. We attribute the occurrence of sub-wavelength hotspots beyond the near field to the phenomenon of superoscillation.

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More information

Published date: 2013
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 350890
URI: https://eprints.soton.ac.uk/id/eprint/350890
ISSN: 1094-4087
PURE UUID: 539325e5-8b30-4faf-8be7-621f6fe983ed
ORCID for Nikolay I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 09 Apr 2013 15:34
Last modified: 03 Dec 2019 02:03

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Contributors

Author: Tapashree Roy
Author: Edward T.F. Rogers

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