A Low-loss and Lightweight Magnetic Material for Electrical Machinery.

A low-loss and lightweight core material, with applications in electrical machinery, is made of highly packed and insulated magnetic microwires (MWs). These MWs are aligned in such a way as to guide the flux in the rotor/stator, with the ultimate goal of increasing efficiency and substantially reducing core losses. Commercial FeNiCo-based MWs with a 127 m diameter and a 33 m insulation coating are utilized.

A non-asymptotic homogenization theory for periodic electromagnetic structures.

Homogenization of electromagnetic periodic composites is treated as a two-scale problem and solved by approximating the fields on both scales with eigenmodes that satisfy Maxwell's equations and boundary conditions as accurately as possible. Built into this homogenization methodology is an error indicator whose value characterizes the accuracy of homogenization. The proposed theory allows one to define not only bulk, but also position-dependent material parameters (e.

Surface waves in three-dimensional electromagnetic composites and their effect on homogenization.

Reflection and transmission of electromagnetic waves at the boundaries of periodic composites (electromagnetic/optical metamaterials) depends in general on both bulk and surface waves. We investigate the interplay of these two contributions using three-dimensional full-wave numerical simulations and a recently developed non-asymptotic homogenization theory.

Effective constitutive parameters of plasmonic metamaterials: homogenization by dual field interpolation.

We introduce a general implementation of the recently proposed homogenization theory [Tsukerman, J. Opt. Soc.

Superfocusing by nanoshells.

Recently researchers demonstrated, both theoretically and in the microwave range experimentally, subwavelength focusing of evanescent waves by patterned plates. The present Letter extends these ideas and the design procedure to scatterers of arbitrary shapes and to the optical range of wavelengths. The analytical study is supported by numerical results.