Method of Moments formulation for the analysis and design of plasmonic nano-optical antennas of arbitrary shape

In this work, the well-known Method of Moments (MoM) is applied to the solution of plasmonic metallic nanostructures at optical frequencies. Using the surface equivalent theorems, the MoM approach is applied only on the material boundary surfaces and interfaces, thus avoiding the cumbersome volumetric discretization of objects and surrounding space. Some canonical examples have been analyzed and the results have been compared with analytical reference solutions, in order to prove the accuracy of this approach. Later on, a plasmonic Yagi-Uda nanoantenna has been analyzed, which demonstrates the interest and applicability of the MoM to the solution of real problems in the visible.