Abstract
We demonstrate the two-color cooling and trapping of alkaline-earth atoms in a grating magneto-optical trap (GMOT). The trap is formed by a single incident laser beam together with four secondary beams that are generated via diffraction from a nanostructured wafer. A grating structure for a GMOT operating with strontium atoms is optimized and fabricated. We trap atoms on the transition at and transfer 25% of these atoms to the second cooling stage on the narrower intercombination transition at , preparing a sample of atoms at . These results demonstrate the applicability of the GMOT technology in conjunction with two widely differing wavelengths and enable the continued miniaturization of alkaline-earth-based quantum technologies like optical atomic clocks.
- Received 16 December 2021
- Revised 18 February 2022
- Accepted 15 March 2022
- Corrected 20 April 2022
DOI:https://doi.org/10.1103/PhysRevApplied.17.044002
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Published by the American Physical Society
Physics Subject Headings (PhySH)
Corrections
20 April 2022
Correction: The previously published Figure 2 was missing all labels and has been replaced.