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We study multiband metamaterials with several spectral band gaps associated with local Mie resonances, for the example of a square lattice of dielectric rods with dielectric permittivity ∊ = 70. We find that the band diagram possesses three Mieresonance gaps, all corresponding to negative effective magnetic permeability. By analysing the wave-propagation patterns, we demonstrate that this periodic...
We reveal that the unique properties of ultrathin metasurface resonators can improve dramatically magnetic resonance imaging (MRI). We place a metasurface formed by an array of metallic wires inside a scanner under the studied object and achieve a substantial enhancement of the radiofrequency magnetic field by means of subwavelength near-field manipulation with metasurface, also allowing to improve...
Nearly perfect concealing of arbitrary objects in ENZ metamaterial acting as an alignment-free cloak is proposed. The scattering suppression relies on the combination of normal and additional modes simultaneously existing in a spatially dispersive material.
Cloaking devices enabling to hide objects from external observers have numerous potential applications but still face challenges in realization, especially in the visible spectral range. In particular, inherent losses and extreme parameters of metamaterials required for the cloaking are the limiting factors. Here, we propose and demonstrate numerically nearly perfect concealing of objects in ENZ-meta-materials...
Interference, one of the major physical phenomena, relies on coherent superposition of waves, undertaking different phase lag. Considering vectorial near-fields structure, the fundamental concept was reconsidered, reformulated, and demonstrated at optical and radio frequencies.
Recent studies have demonstrated that it is possible to modify the properties of metamaterials by electromagnetic waves via inducing mechanical deformations of samples and therefore changing material properties. As an example, optical rotation of chiral particles was demonstrated [1], and a rich variety of nonlinear behaviour was achieved with magneto-elastic metamaterials [2]. The range of possible...
We show theoretically and experimentally that by adjusting the lattice configuration we are able to manipulate the near-field interaction of resonant particles, and thus tune the response of a lattice of split-ring resonators.
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