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. 2023 Oct 14;14:6484. doi: 10.1038/s41467-023-42271-w

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© The Author(s) 2023

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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — a The schematic of the experimental setup for imaging and edge detection experiments. b–e Experiments at 543.5 nm wavelength (illuminated with XYZ green laser). b, d The reference (no metasurface) and (c, e) edge detected (with metasurface) images of (b, c) the Northwestern Wildcats logo and (d, e) the letter “N” of Northwestern University logo. f–i Experiments at 633 nm wavelength (illuminated with HeNe red laser). f, h The reference (no metasurface) and (g, i) edge detected (with metasurface) images of (f, g) the Northwestern Wildcats logo and (f, h) the letter “N” of Northwestern University logo. j, k The horizontal cuts of the images under (j) green and (k) red laser illumination. The dashed lines in (d), (e), (h), and (i) mark the location of the horizontal cuts.