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. 2022 Jan 24;12:1280. doi: 10.1038/s41598-022-05313-9

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© The Author(s) 2022

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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Calculated field intensities of a supermode at different values of curvature (C) applied to the TCCF. All the calculations were carried out at 1552.5 nm. The solid arrows indicate the direction of the bending and the dashed arrows show the central core of the TCCF. Each blue area has dimensions of 40 × 40 μm².