Super-resolution without evanescent waves

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


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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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1021/nl9002014
ISSNs: 1530-6984 (print)
Related URLs:
Subjects: Q Science
T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology
Q Science > QC Physics
Divisions : University Structure - Pre August 2011 > Optoelectronics Research Centre
ePrint ID: 70921
Accepted Date and Publication Date:
Date Deposited: 10 Mar 2010
Last Modified: 31 Mar 2016 13:01
NanoPhotonics Portfolio Partnership
Funded by: EPSRC (EP/C511786/1)
October 2004 to December 2009

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