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. 2018 Oct 19;8:15536. doi: 10.1038/s41598-018-33617-2

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© The Author(s) 2018

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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(a) Two-dimensional (2D) mapping of the electric-field (E_x) distribution around the slot antenna area on the substrate surface, obtained from the FDTD simulation. (b) 2D electric-field distribution (E_x) for the hybrid slot antenna devices. The height and width of the AgNW were 30 nm; (c) and (d) line profiles of E_x along the dotted lines in (a) and (b), respectively.