Overcoming the adverse effects of substrate on the waveguiding properties of plasmonic nanoparticle chains

Ilia L. Rasskazov, Sergei V. Karpov, George Y. Panasyuk, Vadim A. Markel
2016 Journal of Applied Physics  
We have studied numerically the propagation of surface plasmon polaritons (SPPs) in linear periodic chains of plasmonic nanoparticles of different shapes. The chains are deposited on top of a thick dielectric substrate. While in many commonly considered cases the substrate tends to suppress the SPP propagation, we have found that this adverse effect is practically absent in the case when the nanoparticles have the shape of oblate spheroids with sufficiently small aspect ratio (e.g., nanodisks)
more » ... hose axis of symmetry coincides with the axis of the chain.
doi:10.1063/1.4940415 fatcat:hvwzgv3jxzcyjgrk3gvzs3qyty