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arXiv · 1210.1310

Sub-Doppler laser cooling of fermionic 40K atoms in three-dimensional gray optical molasses

Diogo Rio Fernandes·Franz Sievers·Norman Kretzschmar·Saijun Wu·C. Salomon·Frédéric Chevy
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Abstract

We demonstrate sub-Doppler cooling of 40K on the D_1 atomic transition. Using a gray molasses scheme, we efficiently cool a compressed cloud of 6.5x10^8 atoms from ~ 4\mK to 20uK in 8 ms. After transfer in a quadrupole magnetic trap, we measure a phase space density of ~10^-5. This technique offers a promising route for fast evaporation of fermionic 40K.

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Diogo Rio Fernandes, Franz Sievers, Norman Kretzschmar, Saijun Wu, C. Salomon, Frédéric Chevy. 2012-10-04. Sub-Doppler laser cooling of fermionic 40K atoms in three-dimensional gray optical molasses. https://doi.org/10.1209/0295-5075%2F100%2F63001

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