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. 2022 Dec 14;12:21629. doi: 10.1038/s41598-022-26257-0

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© The Author(s) 2022

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(a, b) are cross-sectional profiles of the cylindrical mirror obtained by laser-scanning confocal microscopy. (c) is cross-sectional SEM image obtained of the facet of the device and shows that the distance between two DBRs is 26.4 µm.