Work

Hyperfine and Zeeman optical pumping and transverse laser cooling of a thermal atomic beam of dysprosium using a single 421-nm laser

Year: 2026

Type: article

Abstract: We demonstrate the effect of Zeeman and hyperfine optical pumping and transverse laser cooling of a dysprosium (Dy) atomic beam on the 4 f 10 6 s 2 ( J = 8 ) → 4 f 10 6 s 6 p ( J = 9 ) transition at 421.291 nm. For Dy 163 , a custom-built electro-optic modulator is used to generate five frequency sidebands required to pump the atoms to the F = 10.5 ground-state hyperfine level, and the light polarization is chosen to pump the atoms to the m F = 10.5 Zeeman sublevel. The atoms are simultaneously laser cooled using a standing wave orthogonal to the atomic beam. The resulting polarized and cooled atomic beam will be used in fundamental physics experiments taking advantage of the “accidental” degeneracy of excited states in Dy, including the ongoing measurement of parity violation in this system.

Source: Physical Review A

DOI: 10.1103/vnsn-pyd1

Authors: Rohan Chakravarthy, Jonathan Agil, Arijit Sharma, Jung Bog Kim, Dmitry Budker