Effective Surface Susceptibility Models for Periodic Metafilms Within the Dipole Approximation Technique

摘要

The most important surface susceptibility models for the electromagnetic characterization of periodic metafilms, based on the dipole approximation method, are systematically analyzed in this paper. Specifically, two well-known techniques, which lead to a set of local effective surface parameters, are investigated along with a new dynamic non-local modeling algorithm. The latter formulation is properly expanded, in order to be applicable for any arbitrary periodic metafilm, irrespective of its way of excitation. The featured schemes are then directly compared toward their ability to efficiently predict the reflection and transmission properties of several lossless and lossy metafilms. Their outcomes are carefully verified through an assortment of numerical simulations, while novel physical insights of the observed phenomena and diverse implementation aspects of the models are extensively discussed.