Journal article

Drastic reduction of plasmon damping in gold nanorods

C Sonnichsen, T Franzl, T Wilk, G von Plessen, J Feldmann, O Wilson, P Mulvaney

PHYSICAL REVIEW LETTERS | AMER PHYSICAL SOC | Published : 2002

Abstract

The dephasing of particle plasmons is investigated using light-scattering spectroscopy on individual gold nanoparticles. We find a drastic reduction of the plasmon dephasing rate in nanorods as compared to small nanospheres due to a suppression of interband damping. The rods studied here also show very little radiation damping, due to their small volumes. These findings imply large local-field enhancement factors and relatively high light-scattering efficiencies, making metal nanorods extremely interesting for optical applications. Comparison with theory shows that pure dephasing and interface damping give negligible contributions to the total plasmon dephasing rate.

University of Melbourne Researchers