Single-resonator double-negative metamaterial
| DWPI Title: Single-resonator double-negative metamaterial, has low-permittivity inclusion to shift lower frequency such that electric and magnetic resonances are in alignment at frequency to provide metamaterial with negative index of refraction |
| Abstract: Resonances can be tuned in dielectric resonators in order to construct single-resonator, negative-index metamaterials. For example, high-contrast inclusions in the form of metallic dipoles can be used to shift the first electric resonance down (in frequency) to the first magnetic resonance, or alternatively, air splits can be used to shift the first magnetic resonance up (in frequency) near the first electric resonance. Degenerate dielectric designs become especially useful in infrared- or visible-frequency applications where the resonator sizes associated with the lack of high-permittivity materials can become of sufficient size to enable propagation of higher-order lattice modes in the resulting medium. |
| Use: Single-resonator double-negative metamaterial. |
| Advantage: The metamaterial allows flexibility in precise alignment of modal resonances to operate further away from large losses associated with a resonant peak region in an effective manner. The metamaterial utilizes a dielectric resonator with a metallic dipole insert to be realized in an easy manner without deterioration in loss performance. |
| Novelty: The metamaterial has a periodic array of single-resonator unit cells with an inclusion in a dielectric structure. The inclusion comprises a high-permittivity inclusion to shift a higher frequency and lowest-order electric resonance of a resonator to a lower frequency and a low-permittivity inclusion to shift a lower frequency and lowest-order magnetic resonance to the higher frequency such that electric resonance and magnetic resonance are in alignment at an operating frequency to provide the metamaterial with a negative index of refraction. |
| Filed: 9/14/2012 |
| Application Number: US13618997A |
| Tech ID: SD 11926.1 |
| 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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