Non-local surface susceptibility model for periodic bianisotropic metafilms

A novel surface susceptibility model for periodic metafilms of electrically-small bianisotropic meta-atoms is analytically derived in this paper. The featured algorithm results in a matrix of non-local surface effective parameters, unlike most of the existing characterization techniques. The accuracy of the proposed methodology is verified by the efficient prediction of the scattering properties of a challenging metafilm which comprises non-planar chiral particles.