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Imaging solutions for a planar stacked MOT

Alan Bregazzi, Paul F. Griffin, Aidan S. Arnold, David P. Arnold, Gerardo Martínez, Rodolphe Boudot, John E. Kitching, Erling Riis, J. P. McGilligan

Published Jul 7, 2021• 1 citation
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A fully integrated and mass producible platform for laser cooling has the potential to revolutionize the growing field of quantum technologies and atomic sensors. Recent advancements in the micro-fabrication of components at the heart of cold atom systems have laid the foundations for the amalgamation of a simple, stackable solution to laser cooling. In this talk we will highlight our recent progress towards a fully chip-scale, cold-atom platform, outlining our approach for on-chip wavelength referencing, examining a solution for imaging atoms in a planar stacked device, and finally discussing the limitations to passively pumped vacuum longevity.
We demonstrate a simple stacked scheme that enables absorption imaging through a hole in the surface of a grating magneto-optical trap (GMOT) chip, placed immediately below a micro-fabricated vacuum cell. The imaging scheme is capable of overcoming the reduced optical access and surface scatter that is associated with this chip-scale platform while further permitting both trapping and imaging of the atoms from a single incident laser beam. The through-hole imaging is used to characterize the impact of the reduced optical overlap volume of the GMOT in the chip-scale cell, with an outlook to an optimized atom number in low volume systems.