A grating-chip atomic fountain

Lewis, Ben and Elvin, Rachel and Arnold, Aidan S. and Riis, Erling and Griffin, Paul F. (2022) A grating-chip atomic fountain. Applied Physics Letters, 121 (16). 164001. ISSN 0003-6951 (https://doi.org/10.1063/5.0115382)

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Abstract

Cold atom fountain clocks provide exceptional long term stability as they increase interrogation time at the expense of a larger size. We present a compact cold atom fountain using a grating magneto-optical trap (GMOT) to laser cool and launch the atoms in a simplified optical setup. The fountain is evaluated using coherent population trapping and demonstrates improved single-shot stability from the launch. Ramsey times up to 100ms were measured with a corresponding fringe linewidth of 5Hz. This technique could improve both short and long-term stability of cold atom clocks while remaining compact for portable applications.

ORCID iDs

Lewis, Ben, Elvin, Rachel ORCID logoORCID: https://orcid.org/0000-0003-0450-4727, Arnold, Aidan S. ORCID logoORCID: https://orcid.org/0000-0001-7084-6958, Riis, Erling ORCID logoORCID: https://orcid.org/0000-0002-3225-5302 and Griffin, Paul F. ORCID logoORCID: https://orcid.org/0000-0002-0134-7554;
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