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. 2019 Oct 17;9:14917. doi: 10.1038/s41598-019-51165-1

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© The Author(s) 2019

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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Intensity profiles of the electric field of the transmissive structural color filters without the ultrathin light-absorbing intermediate layer at (a) 460 nm and (b) 650 nm, and with the ultrathin light-absorbing intermediate layer at (c) 460 nm and (d) 650 nm. The absorbing layer inserted in the middle of the cavity greatly suppresses only the 5th order F-P resonance at 460 nm but doesn’t affect the 3rd order F-P resonance at 650 nm. (e) Simulated transmission spectra and (f) the corresponding chromaticity diagrams of the red structural color with (solid) and without (dashed) the light-absorbing intermediate Ge layer.