Versatile two-dimensional potentials for ultra-cold atoms.
OPTICS EXPRESS(2008)
Abstract
We propose and investigate a technique for generating smooth two-dimensional potentials for ultra-cold atoms based on the rapid scanning of a far-detuned laser beam using a two-dimensional acousto-optical modulator (AOM). We demonstrate the implementation of a feed-forward mechanism for fast and accurate control of the spatial intensity of the laser beam, resulting in improved homogeneity for the atom trap. This technique could be used to generate a smooth toroidal trap that would be useful for static and dynamic experiments on superfluidity and persistent currents with ultra-cold atoms. (c) 2008 Optical Society of America.
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Key words
laser cooling,feed forward,persistent current
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