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Hybrid Plasmonic–Photonic Nanostructures: Gold Nanocrescents Over Opals
Author(s) -
Robbiano Valentina,
Giordano Marina,
Martella Christian,
Stasio Francesco Di,
Chiappe Daniele,
de Mongeot Francesco Buatier,
Comoretto Davide
Publication year - 2013
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201200060
Subject(s) - materials science , plasmon , photonic crystal , photonics , surface plasmon resonance , optoelectronics , monolayer , nanostructure , nanoparticle , optics , nanotechnology , physics
The interaction of localized surface plasmon resonances (LSPRs) with the photonic modes in an opal photonic crystal is reported. Gold nanocrescents are evaporated at glancing angles over both microsphere monolayers and artificial opals. Microsphere monolayers allow the three localised plasmonic resonances observed in the nanocrescent optical spectra to be identified. By changing the microsphere diameter, the opal photonic stop band and a selected plasmonic resonance can be spectrally overlapped causing a dramatic change of the properties of both excitations. The creation of new modes is observed, whose spectral position and dispersion properties are a combination of those localised in nanoparticle plasmons and in the photonic crystal.