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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. 7 — Images of the POC CSI security tag (λ_exc = 365 nm) using various colour and time resolution filtered CPLP. A–C Total emission under steady state illumination using a (A) LP390 nm (B) LP495 nm and (C) LP570 nm filter. D Time-resolved image (t_d = 20 µs) using a LP570 nm. E L-R EDCC image using a BP594/10 nm filter demonstrating clear CPL based emission for Δ-Eu:L1 whilst (F) R-L shows clear CPL based emission for Λ-Eu:L1. Numbers in red are avg. 8-bit pixel intensity values for each image region, t_acq = 70–700 ms, 10 avg. image, 1−100 total image accumulation. Scale bar = 2 mm.