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



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



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 1S01P1 and 3P23D3 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: