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Photonics 2018, 5(2), 7; https://doi.org/10.3390/photonics5020007

Impedance-Matched, Double-Zero Optical Metamaterials Based on Weakly Resonant Metal Oxide Nanowires

Instituto de Estructura de la Materia (IEM-CSIC), Consejo Superior de Investigaciones Científicas, Serrano 121, 28006 Madrid, Spain
Current address: Data Storage Institute, A*STAR (Agency for Science, Technology and Research), Singapore 138634, Singapore.
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Author to whom correspondence should be addressed.
Received: 28 February 2018 / Revised: 21 March 2018 / Accepted: 22 March 2018 / Published: 28 March 2018
(This article belongs to the Special Issue Nonlinear Dielectric Photonics and Metasurfaces)
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Abstract

Artificial optical metamaterial with a zero index of refraction holds promise for many diverse phenomena and applications, which can be achieved with vacuum (or related) surface impedance and materials in the optical domain. Here, we propose simple metal-oxide nanorods as meta-atoms on the basis of an effective medium approach, based on their weak overlapping (electric/magnetic) resonances. We thus studied the optical properties of TiO 2 nanowire arrays with a high-filling fraction through their photonic band structure, which exhibits a double-degeneracy point without a band gap at the center of the Brillouin zone. Various configurations are considered that reveal their performance over a reasonable range of incident wave vectors as impedance-matched, double-zero, bulk (low-loss) metamaterials. View Full-Text
Keywords: ε-near-zero metamaterials; double-zero metamaterials; metal-oxide nanowires ε-near-zero metamaterials; double-zero metamaterials; metal-oxide nanowires
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Abujetas, D.R.; Paniagua-Domínguez, R.; Sánchez-Gil, J.A. Impedance-Matched, Double-Zero Optical Metamaterials Based on Weakly Resonant Metal Oxide Nanowires. Photonics 2018, 5, 7.

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