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. 2017 Jun 28;7:4326. doi: 10.1038/s41598-017-04692-8

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Au/VO₂ paired-strip based active magnetic THz metamaterial. (a) Simulated transmission spectra. (b) The x-component of magnetic field (|H_x|) at the geometric center of the spacer as a function of σ₁. (c) The dispersion of (|H_x|) when σ₁ = 10 and 2000 Ω⁻¹ cm⁻¹. (d) The distribution of magnetic field at the two resonances (i.e., 1.03 and 1.41 THz) for a series of σ₁ values. The white dashed line indicates the surface of the substrate and the green line represents the VO₂ film. All field data was normalized to the magnetic field magnitude of the incident wave.