Identifying microwave magnetic resonance in chiral elements for creation of controlled matched absorbing metastructures

摘要

It has been suggested a method for identifying and separating magnetic and electric microwave resonance responses of conductive chiral and bianisotropic elements by reflection of electromagnetic waves in the standing and traveling-wave modes. It has been observed experimentally (in waveguide) and confirmed numerically (in free space) that magnetic resonance, which is excited by microwave magnetic field h, and electric resonances, excited by electric field E, show drastically different resonance curves of reflection. These distinctions allow to identifying the magnetic resonance response and using magnetically excited elements for broadband matching of absorbers instead of traditional quarter-wavelength layer. We have fabricated and investigated matched absorbing metastructures which are controlled by voltage as well by light of remote laser pointer.