Generalized Retrieval Method for Metamaterial Constitutive Parameters Based on a Physically-Driven Homogenization Approach

摘要

Based on the recently introduced homogenization theory developed in [Phys.Rev. B 84, 075153 (2011)], we propose a generalized retrieval method thatallows extracting physically meaningful bulk effective parameters fromconventional scattering measurements of periodic metamaterial samples composedof subwavelength inclusions. We show that, compared to conventional approaches,our method is able to capture the anomalous physics in the wave interactionwith resonant metamaterials and return physically meaningful homogenizedparameters that retain local properties in the long-wavelength limit. As abyproduct, we are also able to retrieve the polarizabilities of the constituentinclusions, which are shown to satisfy expected dispersion properties forpassive inclusions, in contrast with conventional retrieval approaches.