Extending dark optical trapping geometries
arXiv:1201.3385 · doi:10.1364/OL.37.002505
Abstract
New counter-propagating geometries are presented for localising ultracold atoms in the dark regions created by the interference of Laguerre-Gaussian laser beams. In particular dark helices, an 'optical revolver,' axial lattices of rings and axial lattices of ring lattices of rings are considered and a realistic scheme for achieving phase-stability is explored. The dark nature of these traps will enable their use as versatile tools for low-decoherence atom interferometry with zero differential light shifts.
3 pages, 6 figures Modified to include referees' improvements
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