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. 2017 May 31;7:2556. doi: 10.1038/s41598-017-02911-w

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© The Author(s) 2017

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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Configuration of the proposed structural color filters resorting to an a-Si:H metasurface. (a) Each filter consists of a 2D lattice of a-Si:H nanodisks on a glass substrate. The nanodisk is embedded in a polymeric material of PMMA, which serves as an index-matching layer. The incident white light is filtered into distinct visible colors depending on the period P and the diameter D. (b) Schematic of a unit a-Si:H nanodisk, with the observation planes defined by the dotted line.