  The propagation of light along an infinite 2D chain of silver nanorods is
analyzed and the dispersion for this waveguide is computed using field
computation for a finite chain of nanorods. In this work, Generalized Multipole
Technique is used for the analysis. This method calculates the imaginary and
real parts of the propagation constant by exciting the chain in one end and
observing propagation of modes along the chain far enough from the excitation.
It is shown that a short chain of finite length is sufficient for the
calculation of the phase constant while the attenuation constant requires a
longer chain. Field distribution is depicted for even and odd modes and it is
shown that in the simulated frequency range only two modes can be excited and
can propagate along the waveguide.
