A Boundary Integral Method for 3-D Nonuniform Dielectric Waveguide Problems via the Windowed Green Function

This communication proposes an efficient boundary-integral-based “windowed Green function” (WGF) methodology for the numerical solution of 3-D general electromagnetic problems containing dielectric waveguides. The approach, which generalizes a recently introduced 2-D version method, provides highly effective solver such problems. In particular, using auxiliary integral representation, proposed method is able to accurately model incident mode excitation. On basis smooth window function, operators along infinite waveguide boundaries are smoothly truncated, resulting in errors that decay faster than any negative power size.