First-principles parameter retrieval of complex single-negative bulk metamaterials

The consistent retrieval of effective parameters for complicated single-negative structures is presented in this paper through a first-principles homogenization method. The proposed technique considers each metamaterial unit-cell as an electrically-small scatterer and evaluates its polarizabilities via a robust process. These outcomes and the extracted wavenum-bers are inserted in the homogenization relations to obtain the required medium parameters.