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. 2017 Oct 20;6(10):e17071. doi: 10.1038/lsa.2017.71

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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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Comparison of the focal performance between the ESM and a traditional metalens. (a) Schematic of the design of the traditional metalens, which is divided into two interleaved zones, with the green nanoslits contributing to one focus and the blue nanoslits contributing to the other focus. (b) SEM image of a traditional metalens. (c, d) The measured field intensities at the real focal plane with LCP incident light for the traditional metalens (c) and for the ESM (d). (e, f) The noise distributions for the traditional metalens (e) and for the ESM (f).