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. 2017 Aug 25;8:356. doi: 10.1038/s41467-017-00391-0

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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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Fig. 2 — A sub-wavelength dielectric rod waveguide with a single-layer metasurface coating. Snapshots of the vector electric field distribution in the x-y plane at 2.8, 3.2, 3.6, and 4.0 GHz for a the bare Teflon rod waveguide and d the Teflon rod waveguide coated by the metasurface guiding layer when excited by an x polarized probe. Snapshots of electric field distribution in the x-z plane at 2.8, 3.2, 3.6, and 4.0 GHz for b the bare Teflon rod waveguide and e the Teflon rod waveguide coated by the metasurface guiding layer. Measured and simulated co-polarized (T _xx) and cross-polarized (T _yx) transmission between the transmitting and receiving probes for c the bare Teflon rod waveguide and f the Teflon rod waveguide coated by the metasurface guiding layer