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Enhanced Light Focusing in Self‐Assembled Optoplasmonic Clusters with Subwavelength Dimensions
Author(s) -
Hong Yan,
Pourmand Mahshid,
Boriskina Svetlana V.,
Reinhard Björn M.
Publication year - 2013
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201202830
Subject(s) - materials science , cluster (spacecraft) , self assembly , electric field , nanoparticle , dielectric , spectroscopy , nanotechnology , redistribution (election) , electromagnetic field , light scattering , vortex , scattering , optical vortex , optoelectronics , magnetic field , chemical physics , optics , physics , quantum mechanics , politics , computer science , political science , law , thermodynamics , programming language
Compact metallo‐dielectric hybrid clusters with subwavelength dimensions are fabricated by template guided self‐assembly. Elastic and inelastic scattering spectroscopy and electromagnetic simulations reveal that hybrid clusters comprising TiO 2 nanoparticles on top of a cluster of strongly coupled gold nanoparticles harness synergistic electromagnetic interactions between the building blocks. This results in a boost of the peak electric field intensity and a redistribution of the field in the ambient medium. The complex phase landscape in the clusters features optical vortices that enhance the magnetic field.