Bianisotropic metamaterials based on twisted asymmetric crosses
| Autor: | Felipe Pérez-Rodríguez, Jorge A. Reyes-Avendano, E Juárez-Ruiz, M P Sampedro |
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| Rok vydání: | 2014 |
| Předmět: |
Physics
Permittivity Condensed matter physics business.industry media_common.quotation_subject Physics::Optics Metamaterial Negative index metamaterials Frequency dependence Homogenization (chemistry) Asymmetry Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials symbols.namesake Optics Fourier transform symbols Bravais lattice business media_common |
| Zdroj: | Journal of Optics. 16:065102 |
| ISSN: | 2040-8986 2040-8978 |
| DOI: | 10.1088/2040-8978/16/6/065102 |
| Popis: | The effective bianisotropic response of 3D periodic metal-dielectric structures, composed of crosses with asymmetrically-cut wires, is investigated within a general homogenization theory using the Fourier formalism and the form-factor division approach. It is found that the frequency dependence of the effective permittivity for a system of periodically-repeated layers of metal crosses exhibits two strong resonances, whose separation is due to the cross asymmetry. Besides, bianisotropic metamaterials, having a base of four twisted asymmetric crosses, are proposed. The designed metamaterials possess negative refractive index at frequencies determined by the cross asymmetry, the gap between the arms of adjacent crosses lying on the same plane, and the type of Bravais lattice. |
| Databáze: | OpenAIRE |
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