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. 2021 Jan 22;11:2065. doi: 10.1038/s41598-021-81578-w

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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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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(a) Schematic views of divided nanocages into two structures of vertical and parallel, which have walls perpendicular and parallel to the direction of incident light polarization, respectively. (b) Resonance wavelength shift of 2*2 and 4*4 nanocages and their divided structures, vertical and parallel, versus different refractive index of surrounding medium. Browser-based version of SketchUp, https://app.sketchup.com, and Origin 2020 version, https://www.originlab.com, have been used for drawing images and making figures, respectively.