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. 2020 Sep 2;9:139. doi: 10.1038/s41377-020-00367-8

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© The Author(s) 2020

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. 9 — a Circularly polarized light with l=0. Top row: spatial distribution of electric fields, middle row: cross-section of the phase distribution, bottom row: cross-section of the intensity distribution. Light carrying b l=−1 and c l=+1 OAM. Top row: wavefront, middle row: cross-section of the phase distribution, and bottom row: cross-section of the intensity distribution. d Illustrations of helical dichroism. Light carrying l=+1 (blue) OAM interacts weakly with the chiral object, while light with l=−1 (pink) interacts strongly and is absorbed