Surface Plasmon Resonances in Strongly Coupled Gold Nanosphere Chains from Monomer to Hexamer

ABSTRACT:

We present experimental data on the light scattering properties of linear chains of gold nanoparticles with up to six nanoparticles and an interparticle spacing of 1 nm. A red shift of the surface plasmon resonance with increasing chain length is observed. An exponential model applied to the experimental data allows determination of an asymptotic maximum resonance at a chain length of 10!12 particles. The
optical data are compared with analytical and numerical calculation methods (EEM and BEM).

KEYWORDS: Surface plasmon, waveguide, nanoparticle, coupling, DNA, assembly