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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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Asymmetric VO₂/Au double-bar resonator based hybrid metamaterial for a tunable THz Fano resonance. Simulated (a) transmission and (b) absorption spectra of the hybrid metamaterial for a series of conductivity values σ₁. (c) Magnetic field distribution at 0.79 THz when σ₁ = 2000 Ω⁻¹ cm⁻¹. (d) The in-gap |H_z| enhancement as a function of σ₁ at 0.79 THz. The case for σ₁ = 2000 Ω⁻¹ cm⁻¹ as a function of frequency is shown in the inset. All data for |H_z| was normalized to the magnetic field magnitude of the incident wave.