Journal
ADVANCED MATERIALS
Volume 25, Issue 1, Pages 115-119Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201202830
Keywords
self-assembly; SERS; optical vortex; photonic-plasmonic resonances; magnetic field enhancement
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Funding
- National Science Foundation [CBET-1159552, CBET-0953121]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1159552] Funding Source: National Science Foundation
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [0953121] Funding Source: National Science Foundation
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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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