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

A.G. Curto, F.J. García de Abajo

Research output: Contribution to journalArticleAcademicpeer-review

12 Citations (Scopus)


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 onethird 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.

Original languageEnglish
Pages (from-to)2479-2484
Number of pages6
JournalNano Letters
Issue number8
Publication statusPublished - Aug 2008
Externally publishedYes


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