Confined Plasmons in Metallic Nanocavities

S. Coyle; M. C. Netti; J. J. Baumberg; M. A. Ghanem; P. R. Birkin; P. N. Bartlett; D. M. Whittaker

doi:10.1103/PhysRevLett.87.176801

Confined Plasmons in Metallic Nanocavities

S. Coyle, M. C. Netti, J. J. Baumberg, M. A. Ghanem, P. R. Birkin, P. N. Bartlett, and D. M. Whittaker

Phys. Rev. Lett. 87, 176801 – Published 2 October 2001

Abstract

We investigate the properties of gold surfaces patterned using a nanoscale “lost wax” technique by electrochemical deposition through a self-assembled latex template. Near-spherical gold nanocavities within the resulting porous films support localized surface plasmons which couple strongly to incident light, appearing as sharp spectral features in reflectivity measurements. The energy of the resonances is easily tunable from ultraviolet to near infrared by controlling the diameter and height of the nanocavities. The energies of these features agree well with the Mie resonances of a perfect spherical void.

Received 25 May 2001

DOI:https://doi.org/10.1103/PhysRevLett.87.176801

Authors & Affiliations

S. Coyle¹, M. C. Netti¹, J. J. Baumberg¹, M. A. Ghanem², P. R. Birkin², P. N. Bartlett², and D. M. Whittaker¹

¹Department of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, United Kingdom
²Department of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom