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. 2017 Sep 22;7:12186. doi: 10.1038/s41598-017-12413-4

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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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(a) Illustration of the atomically thin graphene layer of surface conductivity σ coating a nano-sized scattering cylinder of relative permittivity ε _d, where the environment medium has a permittivity ε. Here we consider an incident TE^z-polarized plane wave. (b) Real and imaginary part of the surface conductivity for graphene at T = 300 K with μ = 0.5 eV and Γ = 0.1 meV. The surface conductivity is given in units of 2πcε ₀ = 1.67 × 10⁻² S. We also include σ _intra representing the Drude model applied to graphene, which is valid in the far infrared and beyond.