Realization of Linear-to-Circular Polarization Conversion by a Single Bifilar Particle

Abstract

Abstract-In this paper, we provide a new theoretical model describing mechanism of electromagnetic radiation (and scattering) by passive single-and double-stranded (bifilar) helices. The proposed model is derived from basic physical principles till the end formulas which were computer processed for predicting a polarization type of the wave scattered by a helix. Comparison of the two types of helical oscillators revealed radical differences in their scattering performance (intensity and polarization). Optimal parameters of the bifilar helix for transformation of the polarization state from linear to circular were found for a non-axial direction of the incident and scattered field. Key features of the proposed model were confirmed by computer simulations.

Ground-plane-less bidirectional terahertz absorber based on omega resonators

“…The energy of the wave is dissipated and transferred into heat. Theoretical details of the effect of nearperfect absorptance are shown in [10] for the exemplary case of helical inclusions [16,17] with compensated chirality; however, the general theoretical model is also valid for other bianisotropic particles.…”