From nanoparticle to nanocable : impact of size and geometrical constraints on the optical modes of Si/SiO2 core/shell nanostructures

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DOIResolve DOI: http://doi.org/10.1063/1.3237162
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TypeArticle
Journal titleApplied Physics Letters
Volume95
Issue13
Pages133102-1133102-3
Subjectcore diameters; core/shell; electron energy loss spectrum; extinction spectra; geometrical configurations; geometrical constraints; interface plasmons; nano-objects; nanocables; optical modes; spatially resolved; spherical nanoparticles; UV region
AbstractIn the extinction spectra of Si/SiO2 core/shell nanostructures, peak features in the near UV region (3-5 eV) appear when the nanostructure geometrical configuration changes from spherical nanoparticles to cylindrical nanocables, with the peak features become more intense in the nanocables of smaller core diameter. Similar feature at ∼4.2 eV is also observed in the spatially resolved electron energy loss spectra (SREELS) of individual nanocable, but not in the nanoparticle. The EELS simulations unravel the origin of such excitation as the monopolar interface plasmon in cylindrical nano-objects, being responsible for the observed near UV extinction modes in nanocables.
Publication date
PublisherAmerican Institute of Physics
LanguageEnglish
AffiliationNational Institute for Nanotechnology; National Research Council Canada
Peer reviewedYes
NPARC number19734715
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Record identifier00300239-aee5-44e5-b7f3-d098c07c6bea
Record created2012-03-30
Record modified2016-05-09
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