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. 2022 Dec 21;13:7848. doi: 10.1038/s41467-022-34197-6

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© The Author(s) 2022

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. 3 — a Experimental map of the metasurface transmittance versus wavelength and incident angle that reflects the dispersion of the transverse magnetic (TM) mode of the single-mode silicon nitride slab corrugated with the grating. b Simulated map of the transmittance that closely matches the experiments in panel a. c Angle-dependent transmittance of the NLM at three wavelengths near the resonant wavelength λ₀ = 630 nm. (dashed line: simulation, solid line: experiment) d Normal incidence transmission images of the NLM taken at various illumination wavelengths around λ₀ = 630 nm show the reduced transmission across the entire patterned area on resonance (NKT supercontinuum source, TM polarized). e Reflection optical microscope image of the NLM.