Near and far field plasmonic properties of metallic alloy nanoparticles: effect of composition and size-dependent plasmon damping

Abstract

Herein, we report the theoretical investigation of two different types of Au-Ag alloy nanoparticles. In detail, the role of composition and localized surface plasmon damping due to the electron-surface scattering on the far field scattering spectra and near field or local electric field enhancement of the small Au-Ag alloy nanospheres and thin alloy nanoshells is studied with the help of analytical theory developed based on Bromwich formulism.