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Super-resolution without evanescent waves

Huang, Fu Min and Zheludev, Nikolay I. (2009) Super-resolution without evanescent waves Nano Letters, 9, (3), pp. 1249-1254. (doi:10.1021/nl9002014).

Record type: Article

Abstract

The past 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 subwavelength 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 subwavelength focus of prescribed size and shape in a field of view beyond the evanescent fields, when illuminated by a monochromatic wave. Moreover, 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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Published date: 2009

Identifiers

Local EPrints ID: 70921
URI: http://eprints.soton.ac.uk/id/eprint/70921
ISSN: 1530-6984
PURE UUID: f2913fe2-a642-4e2b-b8ad-997f1b3b1b4e

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Date deposited: 10 Mar 2010
Last modified: 19 Jul 2017 00:02

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Author: Fu Min Huang

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