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Nano Lett. 2008 Aug;8(8):2479-84. doi: 10.1021/nl801502q. Epub 2008 Jul 9.

Near-field optical phase antennas for long-range plasmon coupling.

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1
Instituto de Optica, CSIC, Madrid, Spain.

Abstract

Plasmon-mediated long-range coupling of optical excitations is shown to be attainable using near-field phase antennas involving nanoparticles situated at focal spots. The antennas rely on metal-surface features that are geometrically arranged to produce constructive interference of plasmons emanating from a source spot over a designated image position. Large image-field intensities and focal spots as narrow as one-third of the wavelength are obtained for source-image separations of tens of micrometers. The ability to strongly couple distant focal spots through phase accumulation produced by engineered plasmon scatterers opens up a vast range of possibilities in contactless plasmon sensing, optical interconnects, and microscopy.

PMID:
18610988
DOI:
10.1021/nl801502q
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