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. 2018 Apr 23;8:6370. doi: 10.1038/s41598-018-24928-5

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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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Calculated intensities (left column), phase (center column), and Fraunhofer diffraction patterns (right column) for EVBs. From the top to the bottom, the first row: Mathieu beam with m = 3 and q = 2; second row: HIG beam with m = 3, p = 3 and ε = 1; third row: HIG beam with m = 3, p = 5 and ε = 1; fourth row: VHG beam with m = 3 and a = 0.80. From second to third rows we see the effect of changing the sign in Eq. (4).