“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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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.
|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
|Date Deposited:||16 Jul 2012 09:20|
|Last Modified:||28 Mar 2014 15:17|
NANOSTRUCTURED PHOTONIC METAMATERIALS
Funded by: EPSRC (EP/G060363/1)
Led by: Nikolay Zheludev
1 January 2010 to 31 December 2015
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