Versatile two-dimensional potentials for ultra-cold atoms.
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.
Schnelle
S K
SK
School of Physical Sciences, University of Queensland, Brisbane, QLD 4072, Australia. sschnell@physics.uq.edu.au
van Ooijen
E D
ED
Davis
M J
MJ
Heckenberg
N R
NR
Rubinsztein-Dunlop
H
H
D000162:Acoustics; D003198:Computer Simulation; D007834:Lasers; D008962:Models, Theoretical; D011789:Quantum Theory; D012542:Scattering, Radiation