Mohsen Rahmani 1 , Andrey E Miroshnichenko , Dang Yuan Lei , Boris Luk'yanchuk , Michael I Tribelsky , Arseniy I Kuznetsov , Yuri S Kivshar , Yan Francescato , Vincenzo Giannini , Minghui Hong , Stefan A Maier
Feb 12 2014
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.
|Keywords:||sub-wavelength nanostructures, surface plasmons, plasmon hybridization, Young's interference|