Coherent control of nanoplasmonic surface-volume mode coupling in gold-silica-gold thin disk resonators

In this article we present a theoretical investigation of gold-silica-gold nanostructures and their properties depending on layer thickness and diameter. We found a remarkable sensitive behavior in the coupling of surface and bulk plasmons with respect to the outer geometry of the disk-like resonators leading to a superposition of distinct modes with a time-dependent amplitude structure. Furthermore, we show a rather complex temporal evolution of plasmonic surface modes depending on the top layer thickness and the asymmetry of the metal disk radii. The results suggest the coherent control of the time-dependent resonant coupling between surface and volume modes by adaptive pulse shaping and foster the field of time-dependent spectroscopy of thin film hybrid nanostructures with single layer thickness down to the two-dimensional limit.