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. 2021 Mar 3;7:5. doi: 10.1038/s41378-020-00226-x

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© The Author(s) 2021

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. 6 — Optically measured results obtained after characterization of the 300 × 300 μm² metahologram, displaying the generation of two holographic images for RCP light incident in the a backward and b forward directions (see supplementary video part ‘b’). c Optical characterization setup used in the amplitude profile measurement of the metahologram⁵⁰. d Polarization conversion ratio (PCR) of the proposed metasurface. At the designed wavelength of 632.8 nm, the simulated PCR is 91%.