Issue |
EPL
Volume 104, Number 6, December 2013
|
|
---|---|---|
Article Number | 63002 | |
Number of page(s) | 6 | |
Section | Atomic, Molecular and Optical Physics | |
DOI | https://doi.org/10.1209/0295-5075/104/63002 | |
Published online | 14 January 2014 |
Gray-molasses cooling of 39K to a high phase-space density
1 Laboratoire Charles Fabry, Institut d'Optique, CNRS, Univ Paris- Sud - 2, Avenue Augustin Fresnel, 91127 Palaiseau Cedex, France
2 LP2N, Univ Bordeaux 1, IOGS, CNRS - 351, Cours de la Libération, 33405 Talence, France
(b) thomas.bourdel@institutoptique.fr
Received: 4 October 2013
Accepted: 20 December 2013
We present new techniques in cooling 39K atoms using laser light close to the D1 transition. First, a new compressed-MOT configuration is taking advantage of gray-molasses–type cooling induced by blue-detuned D1 light. It yields an optimized density of atoms. Then, we use pure D1 gray molasses to further cool the atoms to an ultra-low temperature of . The resulting phase-space density is
and will ease future experiments with ultracold potassium. As an example, we use it to directly load up to
atoms in a far detuned optical trap, a result that opens the way to the all-optical production of potassium degenerate gases.
PACS: 37.10.De – Atom cooling methods / 37.10.Gh – Atom traps and guides / 67.85.-d – Ultracold gases, trapped gases
© EPLA, 2013
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