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. 2021 Aug 27;10:171. doi: 10.1038/s41377-021-00611-9

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© The Author(s) 2021

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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Fig. 5 — a Evolution of reflection spectra of the sensor as the force increased from 0 to 2700 nN, as indicated by the arrows. b Dip wavelength versus force. The line is the linear fitting of measured data points and the error bar is obtained by critically repeating the experiment of force measurement three times. c Simulation results of deformation distribution based on FEM