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Abstract
Gray molasses is a powerful tool for sub-Doppler laser cooling of atoms to low temperatures. For alkaline atoms, this technique is commonly implemented with cooling lasers which are blue-detuned from either the D1 or D2 line. Here we show that efficient gray molasses can be implemented on the D2 line of 40K with red-detuned lasers. We obtained temperatures of 48(2)µK, which enables direct loading of 9.2(3)x106 atoms from a magneto-optical trap into an optical dipole trap. We support our findings by a one-dimensional model and three-dimensional numerical simulations of the optical Bloch equations which qualitatively reproduce the experimentally observed cooling effects.
Original language | English |
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Article number | 095002 |
Journal | Journal of Physics B: Atomic, Molecular and Optical Physics |
Volume | 50 |
Issue number | 9 |
DOIs | |
Publication status | Published - 12 Apr 2017 |
Keywords
- Atomic physics
- Gray molasses
- Laser cooling
- Ultracold atoms
- sub-Doppler cooling
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Dive into the research topics of 'Sub-Doppler laser cooling of 40K with Raman gray molasses on the D2 line'. Together they form a unique fingerprint.Projects
- 1 Finished
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Adv atom traps for precise rotation sens: Leverhulme Award : Advanced Atom Traps
Cassettari, D. (PI)
1/10/13 → 31/12/16
Project: Standard
Datasets
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Sub-Doppler laser cooling of 40K with Raman gray molasses on the D2 line (dataset)
Bruce, G. D. (Creator), Haller, E. (Creator), Peaudecerf, B. (Creator), Cotta, D. A. (Creator), Andia, M. (Creator), Wu, S. (Creator), Johnson, M. Y. H. (Creator), Lovett, B. W. (Creator) & Kuhr, S. (Creator), University of Strathclyde, 20 Feb 2017
DOI: 10.15129/d638461d-9d68-43ff-b6e7-151d66fc7f2b
Dataset