Journal
SMALL
Volume 10, Issue 3, Pages 576-583Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201301419
Keywords
sub-wavelength nanostructures; surface plasmons; Young's interference; plasmon hybridization
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Funding
- SERC Agency of Science, Technology and Research (A*STAR) Superlens Program [092 154 0099]
- Australian Research Council
- EPSRC Active Plasmonics Programme
- Leverhulme Trust
- Russian Fund for Basic Research [12-02-00391]
- [1-ZVAL]
- [1-ZVAW]
- Engineering and Physical Sciences Research Council [EP/H000917/1, EP/D063329/1, EP/H000917/2] Funding Source: researchfish
- EPSRC [EP/H000917/2, EP/H000917/1, EP/D063329/1] Funding Source: UKRI
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It is demonstrated hererin both theoretically and experimentally that Young's interference can be observed in plasmonic structures when two or three nanoparticles with separation on the order of the wavelength are illuminated simultaneously by a plane wave. This effect leads to the formation of intermediate-field hybridized modes with a character distinct of those mediated by near-field and/or far-field radiative effects. The physical mechanism for the enhancement of absorption and scattering of light due to plasmonic Young's interference is revealed, which we explain through a redistribution of the Poynting vector field and the formation of near-field subwavelength optical vortices.
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