LAUSR

ABSTRACT In this paper, we study wave transmission via the stacked structures of the periodic arrays of two-dimensional holes drilled in metallic films using a simple analytical circuit model. The circuit model well explains the behavior of the multilayered structure for both thick and very thin metallic films. For very thin metallic films (equivalent to metallic meshes), the proposed surface admittance indicates that capacitive effects appear at high frequencies, while the common surface admittance obtained by heuristic approaches is purely inductive. We extract the effective medium of the structure. The effective medium is computed by solving the eigenvalues problem corresponding to the transfer matrix of a single unit cell of the structure. The comparison between the outcomes and those achieved through full-wave simulations shows excellent accordance with each other. The effective medium obtained for the structure shows which structure can act as the negative permittivity and epsilon-near-zero metamaterials at some frequencies regime.