Journal
NANO LETTERS
Volume 12, Issue 6, Pages 2728-2731Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl2043437
Keywords
Light localization; metamaterials; coherent control; nanophotonics
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Funding
- Engineering and Physical Sciences Research Council, U.K.
- Royal Society
- EPSRC [EP/F040644/1, EP/G060363/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G060363/1, EP/F040644/1] Funding Source: researchfish
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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.
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