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Superresolution without evanescent fields

Superresolution without evanescent fields
Superresolution without evanescent fields
The last decade has seen numerous efforts to achieve imaging resolution beyond that of the Abbe-Rayleigh diffraction limit. The main direction of research aiming to break this limit seeks to exploit the evanescent components containing fine detail of the electromagnetic field distribution at the immediate proximity of the object. Here we propose a solution that removes the need for evanescent fields. The object being imaged or stimulated with sub-wavelength accuracy does not need to be in the immediate proximity of the superlens or field concentrator: an optical mask can be designed that creates constructive interference of waves known as superoscillation, leading to a sub-wavelength focus of prescribed size and shape in a field of view beyond the evanescent fields, when illuminated by a monochromatic wave. We demonstrate that such a mask may be used not only as a focusing device, but also as a super-resolution imaging device.
Huang, F.M.
e97ddff0-cca2-4e2a-951c-33da3fe213df
Kao, T.S.
68b546f6-a0c8-455e-928a-5876de01a87d
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Huang, F.M.
e97ddff0-cca2-4e2a-951c-33da3fe213df
Kao, T.S.
68b546f6-a0c8-455e-928a-5876de01a87d
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

Huang, F.M., Kao, T.S. and Zheludev, N.I. (2009) Superresolution without evanescent fields. European Conference on Lasers and Electro-Optics (CLEO/Europe-EQEC), Munich, Germany. 14 - 19 Jun 2009.

Record type: Conference or Workshop Item (Paper)

Abstract

The last decade has seen numerous efforts to achieve imaging resolution beyond that of the Abbe-Rayleigh diffraction limit. The main direction of research aiming to break this limit seeks to exploit the evanescent components containing fine detail of the electromagnetic field distribution at the immediate proximity of the object. Here we propose a solution that removes the need for evanescent fields. The object being imaged or stimulated with sub-wavelength accuracy does not need to be in the immediate proximity of the superlens or field concentrator: an optical mask can be designed that creates constructive interference of waves known as superoscillation, leading to a sub-wavelength focus of prescribed size and shape in a field of view beyond the evanescent fields, when illuminated by a monochromatic wave. We demonstrate that such a mask may be used not only as a focusing device, but also as a super-resolution imaging device.

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More information

Published date: 14 June 2009
Venue - Dates: European Conference on Lasers and Electro-Optics (CLEO/Europe-EQEC), Munich, Germany, 2009-06-14 - 2009-06-19

Identifiers

Local EPrints ID: 79013
URI: https://eprints.soton.ac.uk/id/eprint/79013
PURE UUID: a975ad38-473f-4a32-93ea-15759f83b2c0
ORCID for N.I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 16 Mar 2010
Last modified: 27 Nov 2019 01:38

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Contributors

Author: F.M. Huang
Author: T.S. Kao
Author: N.I. Zheludev ORCID iD

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