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. 2017 Apr 5;8:14992. doi: 10.1038/ncomms14992

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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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Measured light focusing with conventional FZP (a) and metasurface FZP (b) under white light illumination (Xenon arc lamp, contrast normalized for viewing purposes). Chromatic aberration is apparent in a while the focal spot at 1 mm appears white in b. Images of the focal region for a conventional FZP illuminated by laser light at 450 nm (c), 550 nm (d) and 650 nm (e) and for the metasurface FZP (f–h), showing the aberration correction for the latter. (i) Theoretical calculation (equation 2) of the focal distance for a conventional FZP (red line) and the measured focal points at the RGB wavelengths of the conventional FZP (crosses) and metasurface FZP (circles). (j) Demonstration of colour imaging using the fabricated metasurface FZP element.