Supplimentary material of article "Optically pumped magnetometer with high spatial resolution magnetic guide for the detection of magnetic droplets in a microfluidic channel". Author: Marc Jofre Affilitation: Department of Signal Theory and Communications, Universitat Politècnica de Catalunya—BarcelonaTech, 08034 Barcelona, Spain DOI: 10.5281/zenodo.7893184 This works contains the supplementary material of [1]. [1] Marc Jofre et al 2023 New J. Phys. 25 013028. https://doi.org/10.1088/1367-2630/acb37a References: [1] Abgrall P and Gué A M 2007 Journal of Micromechanics and Microengineering 17 R15–R49 URL https://doi.org/10.1088/0960-1317/17/5/r01 [2] Osborne J, Orton J, Alem O and Shah V 2018 Fully integrated, standalone zero field optically pumped magnetometer for biomagnetism Steep Dispersion Engineering and Opto-Atomic Precision Metrology XI (Proc. 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Supplementary material of [1]. [1] Marc Jofre et al 2023 New J. Phys. 25 013028. https://doi.org/10.1088/1367-2630/acb37a