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. 2017 Jul 28;6(7):e17017. doi: 10.1038/lsa.2017.17

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Copyright © 2017 The Author(s)

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 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-nc-nd/4.0/

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Experimental characterization of the color-selective phase gradient metasurface. (a) SEM image of a fabricated phase gradient metasurface with a supercell consisting of four dolmen structures, acquired at 30°. (b, c) Reflection intensity as a function of both wavelength and reflection angle under normal incidence conditions: (b) measurements and (c) SIE simulations. (d–f) Experimental Fourier images of the light reflected from the metasurface at three different wavelengths: (d) , (e) and (f) . The red curves on top show the intensity profile along the principle reflection plane, indicated by the white dashed line.

Inline graphic — Experimental characterization of the color-selective phase gradient metasurface. (a) SEM image of a fabricated phase gradient metasurface with a supercell consisting of four dolmen structures, acquired at 30°. (b, c) Reflection intensity as a function of both wavelength and reflection angle under normal incidence conditions: (b) measurements and (c) SIE simulations. (d–f) Experimental Fourier images of the light reflected from the metasurface at three different wavelengths: (d) , (e) and (f) . The red curves on top show the intensity profile along the principle reflection plane, indicated by the white dashed line.