Continuous generation of an ultracold atomic beam using crossed moving optical lattices

Authors

Shoichi Okaba, Ryoto Takeuchi, Shigenori Tsuji, and Hidetoshi Katori

Abstract

Using orthogonally crossed moving lattices, we demonstrate the continuous transport of ⁸⁸Sr atoms in the long-lived metastable ³P₀ and ³P₂ states to a region free from scattered laser-cooling light, while two-stage cooling on the ¹S₀–¹P₁ and ³P₂–³D₃ transitions is being conducted. The transfer efficiency between the crossed lattices was close to unity when laser cooling was applied in the crossed region. For a clock laser propagating along the lattice axis, such a lattice-trapped atomic beam enables continuous interrogation of the clock transition free from the Doppler effect arising from the thermal motion of atoms.

Physical Review Applied: https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.21.034006