Abstract
In this work, we present a Boundary Element Method (BEM) for modeling the optical response from a deep nanometric metallic wire waveguide with an arbitrary transverse cross section. Instead of using a local parameter, i.e. permittivity, to describe the electromagnetic (EM) property of the material constituting the guide, a nonlocal hydrodynamic model is considered to give a much finer description for the detailed dynamics of conduction electrons in the metal. Together with this nonlocal model, Maxwell's equations are solved within the framework of the Boundary Element Method (BEM). The numerical result is contrasted with the analytical one and a very good agreement is seen.