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. 2018 Apr 9;9:1342. doi: 10.1038/s41467-018-03778-9

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© The Author(s) 2018

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. 3 — Bianisotropic metasurfaces for scattering-free anomalous refraction. a–c represent the numerical simulation of the total pressure field for bianisotropic metasurfaces and GSL metasurfaces when θ_t = 60°, 70°, and 80°. The insets show the phase evolution inside the metasurface. d–f represent the impedance matrices profile for θ_i = 0° and θ_t = 60°, 70°, and 80°. Here The denotes theoretical requirements, whereas Opt denotes the impedance values achieved by structure optimization