Shell thickness dependent plasmonic resonances in concentric core-shell nanoparticles

Abstract

In this paper, we investigate the effects of silver shell thickness on the pasmonic resonances in single layer concentric core-shell particles by Mie theory. The plasmonic resonance is shown to be strongly influenced by the changing of shell thickness which leads the changes of dipolar and high order extinction resonance wavelength shift properties. Theoretical calculations indicated plasmon hybridization and phase retardation play an important role to influence the shift direction. Furthermore, different environment and geometrical properties are also considered.