Resonant dielectric metamaterials
| DWPI Title: Resonant dielectric metamaterial for magnetodielectric structure, comprises dielectric matrix and two different dielectric particles which are arranged in cubic array and contain zirconia or titania-based ceramic, embedded in matrix |
| Abstract: A resonant dielectric metamaterial comprises a first and a second set of dielectric scattering particles (e.g., spheres) having different permittivities arranged in a cubic array. The array can be an ordered or randomized array of particles. The resonant dielectric metamaterials are low-loss 3D isotropic materials with negative permittivity and permeability. Such isotropic double negative materials offer polarization and direction independent electromagnetic wave propagation. |
| Use: Resonant dielectric metamaterial is used for magnetodielectric structures e.g. flat compact perfect dielectric lenses, spatial filters, electrically-small antennas and radio frequency prism. |
| Advantage: The resonant dielectric metamaterial has excellent electric permittivity, magnetic permeability, electromagnetic properties and resonant characteristics. One set of spheres in the unit cell provides an electric resonance at about the same frequency that the other set of spheres provides a magnetic resonance, such that providing the double negative property. The lowering of the absolute value of the refractive index while maintaining the ratio improves the impedance mismatch with free-space. |
| Novelty: A resonant dielectric metamaterial comprises a dielectric matrix, dielectric particles (a) embedded in the matrix, and dielectric particles (b) embedded in the matrix. Each particle of dielectric particles (a) is identically shaped and has identical permittivity. The particles (a) have dielectric constant higher than the dielectric constant of the matrix. Each particle of dielectric particles (b) is identically shaped and has identical permittivity. The dielectric particles (a) and (b) are arranged in cubic array and comprise alumina, zirconia or titania-based ceramic. |
| Filed: 7/26/2011 |
| Application Number: US13191176A |
| Tech ID: SD 11364.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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