Resonant phenomena in an all-dielectric rectangular circuit induced by a plane microwave

Abstract

Theoretical and experimental investigations of the main electromagnetic resonances excited by linearly polarized microwaves in a rectangular, thin, all-dielectric subwavelength circuit are presented. Displacement and polarization currents induced in this anisotropic circuit are shown to produce resonant magnetic and electric dipoles. The spectra of these dipoles measured in the near zone of the rectangular circuit frames indicate a variety of resonances subject to the orientation of the frame with respect to the polarization and directivity of the incident radiation. The frames arrangement in three orthogonal planes, normal respectively to the electric component, the magnetic component and the wave vector of the driving wave, illustrate the multitude of narrow polarization-dependent resonances, ensuring the inversion of magnetic inductance and electric displacement in the rectangular frame. These rectangular circuit frames can be used as a multiresonant dielectric metaelements.