Non-destructive spatial heterodyne imaging of cold atoms

Details Non-destructive spatial heterodyne imaging of cold atoms Non-destructive spatial heterodyne imaging of cold atoms

2000-09-25

arxiv.org/abs/physics/0009073v2

Optics Lett. 26, 137 (2001)

Physics

Atomic Physics

text+3 figures, submitted to Optics Letters

Scientific paper

10.1364/OL.26.000137

We demonstrate a new method for non-destructive imaging of laser-cooled atoms. This spatial heterodyne technique forms a phase image by interfering a strong carrier laser beam with a weak probe beam that passes through the cold atom cloud. The figure of merit equals or exceeds that of phase-contrast imaging, and the technique can be used over a wider range of spatial scales. We show images of a dark spot MOT taken with imaging fluences as low as 61 pJ/cm^2 at a detuning of 11 linewidths, resulting in 0.0004 photons scattered per atom.

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