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. 2023 Mar 20;14:1537. doi: 10.1038/s41467-023-37329-8

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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 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. 4 — A (top) Conventional photo and (bottom) time-resolved CPLP of Λ and Δ-Eu:L4 in embedded into optical brightener free paper (c = 5 × 10⁻⁶ M) using 365 nm UV illumination from the smooth side of the paper. Scale bar = 0.5 cm. B CPL emission spectra of Δ- (red) and Λ- (blue) enantiomers of Eu:L4 in MeOH (λ_exc = 365 nm) highlighting the spectral window selected for photography using an BP594/10 (OD4.0) filter. C Time-resolved (t_d = 20 µs) Images extracted from the quad polarisation view camera highlighting the recorded right- and left-handed emission with respect to the built-in polariser orientation to the fixed QWP fast axis. Numbers in red are avg. 8-bit pixel intensity values for each image region, t_acq = 300 ms, 10 avg. image, 100 total image accumulation.