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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Grover Swartzlander
  • Vol. 30, Iss. 11 — Nov. 1, 2013
  • pp: 2869–2874

Sub-Doppler cooling of neutral atoms in a grating magneto-optical trap

J. Lee, J. A. Grover, L. A. Orozco, and S. L. Rolston  »View Author Affiliations

JOSA B, Vol. 30, Issue 11, pp. 2869-2874 (2013)

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The grating magneto-optical trap (GMOT) requires only one beam and three planar diffraction gratings to form a cloud of cold atoms above the plane of the diffractors. Despite the complicated polarization arrangement, we demonstrate sub-Doppler cooling of Rb87 atoms to a temperature of 7.6(0.6)μK through a multistage, far-detuned GMOT in conjunction with optical molasses. A decomposition of the electric field into polarization components for this geometry does not yield a mapping onto standard sub-Doppler laser-cooling configurations. With numerical simulations, we find that the polarization composition of the GMOT optical field, which includes σ and π polarized light, does produce sub-Doppler temperatures.

© 2013 Optical Society of America

OCIS Codes
(140.3320) Lasers and laser optics : Laser cooling
(020.1335) Atomic and molecular physics : Atom optics

ToC Category:
Atomic and Molecular Physics

Original Manuscript: June 3, 2013
Revised Manuscript: July 23, 2013
Manuscript Accepted: September 11, 2013
Published: October 11, 2013

J. Lee, J. A. Grover, L. A. Orozco, and S. L. Rolston, "Sub-Doppler cooling of neutral atoms in a grating magneto-optical trap," J. Opt. Soc. Am. B 30, 2869-2874 (2013)

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