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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 5 — Mar. 1, 2013
  • pp: 661–663

Atom number in magneto-optic traps with millimeter scale laser beams

Gregory W. Hoth, Elizabeth A. Donley, and John Kitching  »View Author Affiliations

Optics Letters, Vol. 38, Issue 5, pp. 661-663 (2013)

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We measure the number of atoms N trapped in a conventional vapor-cell magneto-optic trap (MOT) using beams that have a diameter d in the range 1–5 mm. We show that the Nd3.6 scaling law observed for larger MOTs is a robust approximation for optimized MOTs with beam diameters as small as 3 mm. For smaller beams, the description of the scaling depends on how d is defined. The most consistent picture of the scaling is obtained when d is defined as the diameter where the intensity profile of the trapping beams decreases to the saturation intensity. Using this definition, N scales as d6 for d<2.3mm but, at larger d, N still scales as d3.6.

OCIS Codes
(020.7010) Atomic and molecular physics : Laser trapping
(020.3320) Atomic and molecular physics : Laser cooling
(130.3990) Integrated optics : Micro-optical devices

ToC Category:
Atomic and Molecular Physics

Original Manuscript: December 26, 2012
Revised Manuscript: January 14, 2013
Manuscript Accepted: January 14, 2013
Published: February 22, 2013

Gregory W. Hoth, Elizabeth A. Donley, and John Kitching, "Atom number in magneto-optic traps with millimeter scale laser beams," Opt. Lett. 38, 661-663 (2013)

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