On the ionization of caesium vapours by a laser beam

Michel Pimbert, J. Cuvellier, J. Pascale +1 more

P Cardinal

Fred L. Mohler, C. Boeckner

闫树斌 Yan Shubin, Tao Geng, Tiancai Zhang +1 more

We have established a caesium double magneto-optical trap (MOT) system for cavity-QED experiment, and demonstrated the continuous transfer of cold caesium atoms from the vapour-cell MOT with a pressure of ~ 1 × 10 −6 Pa to the ultra-high-vacuum (UHV) MOT with a pressure of ~ 8 × 10 −8 Pa via a focused continuous-wave transfer laser beam. The effect of frequency detuning as well as the intensity of the transfer beam is systematically investigated, which makes the transverse cooling adequate before the atoms leak out of the vapour-cell MOT to reduce divergence of the cold atomic beam. The typical cold atomic flux got from vapour-cell MOT is ~ 2 × 10 7 atoms/s. About 5 × 10 6 caesium atoms are recaptured in the UHV MOT.

Fred L. Mohler, C. Boeckner, R. Stair +1 more

Luming Li, Xiang Peng, Cheng Liu +2 more

We report for the first time, according to our knowledge, an experiment in which a light pulse is decelerated to 2000 m s −1 and stored in a caesium vapour cell for a period of time without using a buffer gas. The storage time of the light can be up to 25 µs by adjusting the laser beam size to an appropriate value.