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. 2018 Jan 22;8:1358. doi: 10.1038/s41598-018-19796-y

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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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Inverse-designed polarization splitter. (A) Schematic drawing (left) and top-view photograph (right) of the 3D-printed 30° polarization splitter. The green rectangle indicates the unit cell of the grating. (B) Simulated (dashed lines) and measured (circles) far-field power as a function of deflection angle for both parallel and perpendicular polarizations. (C) and (D) Simulated H_z and E_z field amplitudes for parallel (C) and perpendicular (D) polarizations, respectively, at 33 GHz. (E) to (H) Simulated (E,F) and measured (G, H) far-field intensity profiles as a function of the output angle and the millimeter-wave frequency for parallel (E,G) and perpendicular (F,H) polarizations.