A chip-scale atomic beam clock.

Autor: Martinez GD; Time and Frequency Division, National Institute of Standards and Technology, Boulder, CO, USA.; Department of Physics, University of Colorado Boulder, Boulder, CO, USA., Li C; School of Physics, Georgia Institute of Technology, Atlanta, GA, USA. lichao@gatech.edu.; Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, USA. lichao@gatech.edu., Staron A; Time and Frequency Division, National Institute of Standards and Technology, Boulder, CO, USA.; Department of Physics, University of Colorado Boulder, Boulder, CO, USA., Kitching J; Time and Frequency Division, National Institute of Standards and Technology, Boulder, CO, USA., Raman C; School of Physics, Georgia Institute of Technology, Atlanta, GA, USA., McGehee WR; Time and Frequency Division, National Institute of Standards and Technology, Boulder, CO, USA. william.mcgehee@nist.gov.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2023 Jun 13; Vol. 14 (1), pp. 3501. Date of Electronic Publication: 2023 Jun 13.
DOI: 10.1038/s41467-023-39166-1
Abstrakt: Atomic beams are a longstanding technology for atom-based sensors and clocks with widespread use in commercial frequency standards. Here, we report the demonstration of a chip-scale microwave atomic beam clock using coherent population trapping (CPT) interrogation in a passively pumped atomic beam device. The beam device consists of a hermetically sealed vacuum cell fabricated from an anodically bonded stack of glass and Si wafers in which lithographically defined capillaries produce Rb atomic beams and passive pumps maintain the vacuum environment. A prototype chip-scale clock is realized using Ramsey CPT spectroscopy of the atomic beam over a 10 mm distance and demonstrates a fractional frequency stability of ≈1.2 × 10 -9 /[Formula: see text] for integration times, τ, from 1 s to 250 s, limited by detection noise. Optimized atomic beam clocks based on this approach may exceed the long-term stability of existing chip-scale clocks, and leading long-term systematics are predicted to limit the ultimate fractional frequency stability below 10 -12 .
(© 2023. This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply.)
Databáze: MEDLINE
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