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Yan Hong, Mahshid Pourmand, Svetlana V. Boriskina and Björn M. Reinhard Enhanced Light Focusing in Self-Assembled Optoplasmonic Clusters with Subwavelength Dimensions Advanced Materials 25

Article first published online: 11 OCT 2012 | DOI: 10.1002/adma.201202830

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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 TiO2 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.

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