Enhanced Raman sideband cooling of caesium atoms in a vapour-loaded magneto-optical trap

Abstract

We report enhanced three-dimensional degenerated Raman sideband cooling (3D DRSC) of caesium (Cs) atoms in a standard single-cell vapour-loading magneto-optical trap. Our improved scheme involves using a separate repumping laser and optimized lattice detuning. We load $1.5\times 10^7$ atoms into the Raman lattice with a detuning of -15.5 GHz (to the ground F = 3 state). Enhanced 3D DRSC is used to cool them from 60 $\mu$K to 1.7 $\mu$K within 12 ms and the number of obtained atoms is about $1.2\times 10^7$. A theoretical model is proposed to simulate the measured number of trapped atoms. The result shows good agreement with the experimental data. The technique paves the way for loading a large number of ultracold Cs atoms into a crossed dipole trap and efficient evaporative cooling in a single-cell system.

arXiv comment9 pages, 4 figures. Accepted in Laser Physics Letters

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Cited by in corpus (2)

• Fano effect in an ultracold atom-molecule coupled system
• Decay-dephasing-induced steady states in bosonic Rydberg-excited quantum gases in an optical lattice