Bianisotropic Homogenization of Optically Thick Metasurfaces

Bianisotropic homogenization for optically thick metasurfaces is demonstrated. The proposed method can homogenize arbitrarily thick metasurface unit cells by dividing the unit cell in propagation direction and treat individual layers. The accuracy of the retrieved parameters is tested with a BA-compatible Maxwell solver. The results indicate a high accuracy for the retrieved BA parameters.