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Continuous polarization-gradient precooling-assisted velocity-selective coherent population trapping

M. S. Shahriar, P. R. Hemmer, M. G. Prentiss, P. Marte, J. Mervis, D. P. Katz, N. P. Bigelow, and T. Cai
Phys. Rev. A 48, R4035(R) – Published 1 December 1993
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Abstract

We show that polarization-gradient cooling occurs in the Λ system, simultaneously with velocity-selective coherent population trapping (VSCPT). Starting with a Doppler temperature sample, this process precools atoms and contains them, to within twice the recoil velocity, a range efficiently capturable by VSCPT. For sodium, this cooling may enhance the rate of three-dimensional VSCPT by 200 times over the rate achievable from Doppler precooling alone. We estimate that in 8 msec, for example, the atoms would be cooled in three dimensions to one-fourth the recoil temperature.

  • Received 14 September 1993

DOI:https://doi.org/10.1103/PhysRevA.48.R4035

©1993 American Physical Society

Authors & Affiliations

M. S. Shahriar, P. R. Hemmer, M. G. Prentiss, P. Marte, J. Mervis, D. P. Katz, N. P. Bigelow, and T. Cai

  • Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
  • Rome Laboratory, Hanscom Air Force Base, Massachusetts 01731
  • Department of Physics and Division of Applied Science, Harvard University, Cambridge, Massachusetts 02138
  • Joint Institute for Laboratory Astrophysics, University of Colorado, Boulder, Colorado 80309
  • Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627

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Vol. 48, Iss. 6 — December 1993

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