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

Li, Y. and Wu, J. and Feng, G. and Nute, J. and Piano, S. and Hackermüller, L. and Ma, J. and Xiao, L. and Jia, S. (2015) Enhanced Raman sideband cooling of caesium atoms in a vapour-loaded magneto-optical trap. Laser Physics Letters, 12 (5). 055501/1-055501/5. ISSN 1612-202X

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Abstract

We report enhanced three-dimensional degenerated Raman sideband cooling (3D DRSC) of caesium (Cs) atoms in a standard single-cell vapour-loaded magneto-optical trap. Our improved scheme involves using a separate repumping laser and optimized lattice detuning. We load 1.5 × 107 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 µK to 1.7 µK within 12 ms and the number of obtained atoms is about 1.2 × 107. 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.

Item Type: Article
Additional Information: Y Li et al 2015 Laser Phys. Lett. 12 055501
Keywords: degenerated Raman sideband cooling, lattice, detuning
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: 10.1088/1612-2011/12/5/055501
Depositing User: Eprints, Support
Date Deposited: 02 Oct 2017 12:06
Last Modified: 14 Oct 2017 08:31
URI: http://eprints.nottingham.ac.uk/id/eprint/46911

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