Inhomogeneous All-Dielectric Magnetic Metamaterials

The work discusses electromagnetic wave behavior that can cause communication loss during spacecraft re-entry, where plasma sheaths can reflect and absorb waves. Studying these effects in space is difficult, so the authors use electromagnetic metamaterials as a laboratory platform. They focus on an all-dielectric metamaterial built around Mie resonances, where the magnetic permeability changes gradually from positive to negative values across the structure. The study examines how an electromagnetic wave behaves when it hits the metamaterial at an oblique angle. The authors report an experimentally demonstrated localized field enhancement together with resonant absorption, linking the observed effects to the inhomogeneous magnetic metamaterial design.