Scattering by a Metamaterial Half-Plane on a PEC Support

The scattering mechanism due to an electromagnetic plane wave impacting on a particular planar composite structure is here studied by means of the Uniform Asymptotic Physical Optics approach. The structure is formed by a perfect electric conductor plane hosting a double negative metamaterial half-screen on its upper surface. The Geometrical Optics field and the diffraction contribution due to the surface discontinuity are added to obtain the total field in the surrounding free space. Numerical tests demonstrate the efficiency of the proposed diffracted field to compensate the discontinuities of the Geometrical Optics field