Resonance Phenomena in Chiral and Chiro-Ferrite One-Dimensional Media in the Microwave Band

摘要

Resonance phenomena in one-dimensional chiral and chiro-ferrite media containing oriented multifilar helices are experimentally investigated in the microwave band. The conditions are found under which a one-dimensional chiral medium may behave as an artificial dielectric characterized by the resonance of dielectric losses or manifest the properties of a magnetodielectric characterized by the resonance of magnetic losses for nonresonance dielectric parameters in the same frequency domain. A Chiral medium in combination with a ferrite, both as an artifical dielectric and artificial magnetodielectric, can be controlled by a constant magnetic field. The possibilities of separate excitation of a ferromagnetic and controlled chiral ferromagnetic resonances (FMRs) in artificial chiral dielectric and in artificial chiral magnetodielectric are analyzed. The property of transforming the polarization of electromagnetic waves by chiral elements is considered. The rotation of the polarization plane and the ellipticity are measured near the resonance as functions of frequency and constant magnetic field. Unconventional manifestation of nonreciprocal phenomena is observed.