Three-dimensional nanofocusing of light through surface plasmon scattering by a lump-like defect in metal/dielectric/metal slot waveguides

Alexander A. Zharov, Nina A. Zharova*, Daria A. Smirnova, Alexender A. Zharov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We show that scattering of a surface plasmon by lump-like defects on the walls of a metal/dielectric/metal slot waveguide may be accompanied by 3D nanofocusing of light. Such nanofocusing results in the emergence of "hot spots" of nanometer size with a field intensity several orders higher than in the incident plasmon. This effect takes place only if the lump size is smaller than some critical value. We also demonstrate that a so-called plasmonic "black hole" can concentrate electromagnetic energy as well. We believe that the effect of plasmon nanofocusing may be used for plasmonic nanosensing or subwavelength microscopy.

Original languageEnglish
Pages (from-to)626-630
Number of pages5
JournalJournal of the Optical Society of America B: Optical Physics
Volume30
Issue number3
DOIs
Publication statusPublished - Mar 2013
Externally publishedYes

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