"Digitally" addressable focusing of light into a subwavelength hot spot.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 22455391.
- Also identified by DOI 10.1021/nl2043437.
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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.
Medical subject headings
- Light
- Models, Chemical
- Nanostructures
- Scattering, Radiation
- Signal Processing, Computer-Assisted
- Surface Plasmon Resonance