期刊
NANO LETTERS
卷 11, 期 9, 页码 3531-3537出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl201783v
关键词
UV plasmonics; nanoparticles; gallium; shape effects; substrate effects; nanoantenna
类别
资金
- USAITC-A [RD 1390-PH-01]
- Ministry of Education of Spain [FIS2007-60158/FIS2010-21984]
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.
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