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. 2017 Jan 20;7:40782. doi: 10.1038/srep40782

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Copyright © 2017, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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The unit cell structure with an angle of 45° to the y axis represents the “0” element (a), and the structure rotated 90° counter-clockwise about the z axis is the “1” element (b). Reflection properties of “0” and “1” elements versus frequency under normal x-polarized electromagnetic incident waves: (c) lattice reflection amplitudes; (d) lattice reflection phases.