“Digitally” addressable focusing of light into a subwavelength hot spot


Kao, T. S., Rogers, E. T. F., Ou, J. Y. and Zheludev, N. I. (2012) “Digitally” addressable focusing of light into a subwavelength hot spot. Nano Letters, 12, (6), 2728-2731. (doi:10.1021/nl2043437).

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Description/Abstract

We show that a plasmonic metamaterial can act as a far-field to near-field transformer that focuses a free-space beam of light into a subwavelength energy hot spot at a prescribed location with a spot size only a small fraction of the wavelength. The hot spot position on the metamaterial can be prescribed and moved at will from one metamolecule of the array to another in a "digital" fashion simply by modulating the input phase profile, thus providing new opportunities for imaging and optical data processing.

Item Type: Article
ISSNs: 1530-6984 (print)
1530-6992 (electronic)
Related URLs:
Keywords: light localization, metamaterials, coherent control, nanophotonics
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Physical Sciences and Engineering > Optoelectronics Research Centre
ePrint ID: 341125
Date Deposited: 16 Jul 2012 09:20
Last Modified: 28 Mar 2014 15:17
Research Funder: EPSRC
Projects:
NANOSTRUCTURED PHOTONIC METAMATERIALS
Funded by: EPSRC (EP/G060363/1)
Led by: Nikolay Zheludev
1 January 2010 to 31 December 2015
URI: http://eprints.soton.ac.uk/id/eprint/341125

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