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It is demonstrated herein 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.
Data Storage Institute, A*STAR (Agency for Science Technology and Research), DSI Building,
5 Engineering Drive 1, 117608, Singapore; Department of Physics, Imperial College
London, London, SW7 2AZ, United Kingdom; Department of Electrical and Computer Engineering,
National University of Singapore, 117576, Singapore.
Journal ID (iso-abbrev): Small
Small (Weinheim an der Bergstrasse, Germany)