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. 2017 Aug 31;7:10280. doi: 10.1038/s41598-017-11145-9

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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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Transmittance spectra obtained when the sensitive region was submerged in solutions of different refractive index. The absorption peaks shift to greater wavelengths when the SMRI increases. (a) Spectra corresponding to the TE mode when the fiber is submerged in solutions of 1.4415–1.4447 SMRI. (b) Spectra corresponding to the TM mode when the fiber is submerged in solutions of 1.4481–1.4487 SMRI