Grating chips for quantum technologies

McGilligan, James P. and Griffin, Paul F. and Elvin, Rachel and Ingleby, Stuart J. and Riis, Erling and Arnold, Aidan S. (2017) Grating chips for quantum technologies. Scientific Reports, 7. 384. ISSN 2045-2322 (

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We have laser cooled3x10^6 87Rb atoms to 3uK in a micro-fabricated grating magneto-optical trap (GMOT), enabling future mass-deployment in highly accurate compact quantum sensors. We magnetically trap the atoms, and use Larmor spin precession for magnetic sensing in the vicinity of the atomic sample. Finally, we demonstrate an array of magneto-optical traps with a single laser beam, which will be utilised for future cold atom gradiometry.