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. 2019 Jan 23;10:399. doi: 10.1038/s41467-019-08358-z

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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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Fig. 3 — Physical mechanism of photoinduced phase transition. a Absorption spectra of ultrathin FeS nanosheets and commercial FeS powders. b FE-SEM image of a single carbon fiber covered by ultrathin FeS nanosheets (scale bar, 5 μm). c Schematic and optical image of a single photodetector structure. d Infrared imaging pictures of FeS/CFC. e I–V curves of the photodetector without and with light illumination at different wavelengths. f Absorption behavior as a function of polarization orientation and incident light wavelength