Optical properties of gold nanorings.

By Javier Aizpurua, P. Hanarp, Duncan S Sutherland, M. Käll, Garnett W. Bryant, F. García de Abajo. Physical Review Letters, 2003

927 citations recorded by the source corpus.

The optical response of ring-shaped gold nanoparticles prepared by colloidal lithography is investigated. Compared to solid gold particles of similar size, nanorings exhibit a redshifted localized surface plasmon that can be tuned over an extended wavelength range by varying the ratio of the ring thickness to its radius. The measured wavelength variation is well reproduced by numerical calculations and interpreted as originating from coupling of dipolar modes at the inner and outer surfaces of the nanorings. The electric field associated with these plasmons exhibits uniform enhancement and polarization in the ring cavity, suggesting applications in near-infrared surface-enhanced spectroscopy and sensing.

Subfields: Biomedical Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/f49ab3dd98796a1a9d8c638a006eae00cebbb766

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In Biomedical Engineering

In Electronic, Optical and Magnetic Materials

Citations in the corpus

Single metal nanoparticles: optical detection, spectroscopy and applications (2011, methodology): “The fabrication of gold nanorings has also been reported in which a ∼25 nm gold film was evaporated onto a selfassembled monolayer of 110 nm polystyrene nanospheres [152].”
Highly ordered nanostructures with tunable size, shape and properties : A new way to surface nano-patterning using ultra-thin alumina masks (2007, background): “[147], tunable optical resonance [148], and circulating magnetic vortex structures [149] in metal nano-rings.”