Magnetoelectric Interactions in Bi-Anisotropic Media

Abstract

Classification of bi-anisotropic media based on the structure of magnetoelectric coupling dyadics is proposed. It appears that the most general bi-anisotropic media can be modeled as composites of only a few basic idealized elements: for reciprocal materials, these elements are uniaxial helices and "hats," and in the case of non-reciprocal media, the fundamental particles are Tellegen elements (coupled electric and magnetic dipoles). In particular, it is shown that some composites with omega-shaped conductive inclusions embedded in an isotropic dielectric matrix can be considered as media with equivalent phantom chiral particles. Also, the mechanism is analyzed of the bi-anisotropic material based on magnetostatic-wave resonators.