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. 2022 Mar 10;12:3939. doi: 10.1038/s41598-022-07104-8

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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 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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Image and emission characteristics of the linear and zig zag array of droplets. (a) Linear dynamic droplet array generated to achieve the acceptor lasing. (b) 3D view of the unitcell of the linear array (c) Schematic of the microdroplets flowing through the channel of the chip (d) The emission from the acceptor molecules in a linear droplet array for different pump pulses at an energy of ~ 130 μJ, in the absence of donor. Zig zag droplet arrays of (e) spherical and (f) triangular microdroplets generated to compare the emission from the linear array. (g) A comparison of the emissions from the spherical (black), triangular (red) and linear (blue) droplet arrays in the absence of donor at an input energy of ~ 1 mJ. The intensity of emission from the spherical droplet array is scaled by a factor of 2000 and that from the triangular droplet array is scaled by a factor of 100. The spectrum in dotted magenta lines represents the emission from the linear array for another pulse at the same pump energy. The inset represents the respective normalized emissions.