Shape matters: plasmonic nanoparticle shape enhances interaction with dielectric substrate.
basic_science · Level V
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- Record sourced from PubMed, PMID 21848270.
- Also identified by DOI 10.1021/nl201783v.
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Abstract
Numerical analyses of the ultraviolet and visible plasmonic spectra measured from hemispherical gallium nanostructures on dielectric substrates reveal that resonance frequencies are quite sensitive to illumination angle and polarization in a way that depends on nanostructure size, shape, and substrate. Large, polarization-dependent splittings arise from the broken symmetry of hemispherical gallium nanoparticles on sapphire substrates, inducing strong interactions with the substrate that depend sensitively on the angle of illumination and the nanoparticle diameter.
Medical subject headings
- Gallium
- Nanotechnology