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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 20, Iss. 5 — May. 1, 2003
  • pp: 968–976

Cooling and trapping of atomic strontium

Xinye Xu, Thomas H. Loftus, John L. Hall, Alan Gallagher, and Jun Ye  »View Author Affiliations

JOSA B, Vol. 20, Issue 5, pp. 968-976 (2003)

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We present a detailed investigation of strontium magneto-optical trap (MOT) dynamics. Relevant physical quantities in the trap, such as temperature, atom number and density, and loss channels and lifetime, are explored with respect to various trap parameters. By studying the oscillatory response of a two-level 1S01P1 88Sr MOT, we firmly establish the laser cooling dynamics predicted by Doppler theory. Measurements of the MOT temperature, however, deviate severely from Doppler theory predictions, implying significant additional heating mechanisms. To explore the feasibility of attaining quantum degenerate alkaline-earth samples via evaporative cooling, we also present the first experimental demonstration of magnetically trapped metastable 88Sr. Furthermore, motivated by the goal of establishing the fermionic isotope 87Sr as one of the highest-quality, neutral-atom-based optical frequency standards, we present a preliminary study of sub-Doppler cooling in a 87Sr MOT. A dual-isotope (87Sr and 88Sr) MOT is also demonstrated.

© 2003 Optical Society of America

OCIS Codes
(020.7010) Atomic and molecular physics : Laser trapping
(140.3320) Lasers and laser optics : Laser cooling
(270.4180) Quantum optics : Multiphoton processes
(300.1030) Spectroscopy : Absorption
(300.2530) Spectroscopy : Fluorescence, laser-induced
(300.6210) Spectroscopy : Spectroscopy, atomic

Xinye Xu, Thomas H. Loftus, John L. Hall, Alan Gallagher, and Jun Ye, "Cooling and trapping of atomic strontium," J. Opt. Soc. Am. B 20, 968-976 (2003)

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