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Aizpurua J, Hanarp P, Sutherland DS, et al. Optical properties of gold nanorings. Phys Rev Lett. 2003;90(5):057401doi: 10.1103/PhysRevLett.90.057401.
Aizpurua, J., Hanarp, P., Sutherland, D. S., Käll, M., Bryant, G. W., & García de Abajo, F. J. (2003). Optical properties of gold nanorings. Physical review letters, 90(5), 057401. https://doi.org/10.1103/PhysRevLett.90.057401
Aizpurua, J, et al. "Optical properties of gold nanorings." Physical review letters vol. 90,5 (2003): 057401. doi: https://doi.org/10.1103/PhysRevLett.90.057401
Aizpurua J, Hanarp P, Sutherland DS, Käll M, Bryant GW, García de Abajo FJ. Optical properties of gold nanorings. Phys Rev Lett. 2003 Feb 07;90(5):057401. doi: 10.1103/PhysRevLett.90.057401. Epub 2003 Feb 03. PMID: 12633394.
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Phys Rev Lett. 2003 Feb 07;90(5):057401. doi: 10.1103/PhysRevLett.90.057401. Epub 2003 Feb 03.

Optical properties of gold nanorings.

Physical review letters

J Aizpurua, P Hanarp, D S Sutherland, M Käll, Garnett W Bryant, F J García de Abajo

Affiliations

  1. National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8423, USA.

PMID: 12633394 DOI: 10.1103/PhysRevLett.90.057401

Abstract

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.

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