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Two-photon cooling of magnesium atoms
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2005 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 72, no 5Article in journal (Refereed) Published
Abstract [en]

A two-photon mechanism for cooling atoms below the Doppler temperature is analyzed. We consider the magnesium ladder system (3s(2))S-1(0)->(3s3p)P-1(1) at 285.2 nm followed by the (3s3p)P-1(1)->(3s3d)D-1(2) transition at 880.7 nm. For the ladder system quantum coherence effects may become important. Combined with the basic two-level Doppler cooling process this allows for reduction of the atomic sample temperature by more than a factor of 10 over a broad frequency range. First experimental evidence for the two-photon cooling process is presented and compared to model calculations. Agreement between theory and experiment is excellent. In addition, by properly choosing the Rabi frequencies of the two optical transitions a velocity independent atomic dark state is observed.

Place, publisher, year, edition, pages
2005. Vol. 72, no 5
Keyword [en]
magnetooptical trap, calcium atoms, laser, spectroscopy, temperature
URN: urn:nbn:se:kth:diva-15208ISI: 000233603400014OAI: diva2:333249
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Sauge, Sebastien
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Optics and Photonics
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