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Merging Polarization Degeneracy and High Localization With All-Dielectric Metasurfaces in Microwave and Near-Infrared Ranges

In this work, we analyze the eigenmodes spectra in all-dielectric metasurfaces consisting of the high-index cylinders, which have the degenerate dispersions of TE and TM eigenmodes. We provide the designs of metasurfaces in the microwave and near-infrared ranges supporting the propagation of both localized and polarization-degenerate guided modes. We analyze the localization and polarization degeneracy degrees for several cases, including either more localized or more polarization-degenerate solutions. Finally, we analyze the substrate impact on the polarization degeneracy removal and propose modified designs with the presence of substrate. The obtained results may form a novel platform for the planar polarization devices.