Analysis of the propagation of light along an array of nanorods using the generalized multipole techniques

In this work, with the help of the generalized multipole technique and an efficient iterative procedure, the complex propagation constant of a plasmonic waveguide comprised of an infinite array of silver nanorods is computed. Our analysis takes into account metallic losses reported elsewhere using experimental methods. A finite array of only eight silver nanorods is also investigated here. The finite array is investigated for its capability of guiding light waves when excited by a plane wave at the specific wavelengths of the guided modes of the corresponding infinite array.