Analysis of Wave Scattering by Composite Dielectric Gratings with Conducting Strips Using Scattering Factors

摘要

We propose a new analytical method of composite dielectric gratings embedded with conducting strips by using the scattering factor in the shadow theory. In the gratings, the scattering factor in the shadow theory play an important role instead of the conventional diffraction amplitudes. Using the scattering factors, we derived directly the expressions of the spectral-domain Green's function for the unit surface electric and magnetic current densities. We analyze the scattering waves by composite structures having dielectric and metallic gratings.