Performance of Doubly Periodic Absorpbing Structures Formed by Spherical Black Holes on a PEC Screen

We consider the problem of electromagnetic plane wave scattering on two-dimensional periodic structures composed of spherical radially inhomogeneous absorbing elements of black hole type arranged on a perfectly conducting screen. A modification of the hybrid projection method is developed for solution of the problem with accounting for the features of the black holes. We discuss several numerical results characterizing the properties of the black-hole-based absorbing structures as well as the effectiveness of the suggested algorithm.