We theoretically investigate the use of red-detuned Laguerre-Gaussian (LG) laser beams of varying azimuthal mode index for producing toroidal optical dipole traps in two-dimensional atomic Bose-Einstein condensates. Higher-order LG beams provide deeper potential wells and tighter confinement for a fixed toroid radius and laser power. Numerical simulations of the loading of the toroidal trap from a variety of initial conditions are also given.

arXiv:cond-mat/0008479Physical Review ADec 12, 2000161 citations

Optics Communications

Laguerre-Gaussian laser beams and ion traps

W. L. Power, Richard Claude Thompson

Published Dec 1, 1996• 7 citations

Publisher

DOI: 10.1016/0030-4018(96)00335-5

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({\mathrm{LG}}_{0}^{1})

and one high-order

({\mathrm{LG}}_{1}^{2})

Laguerre-Gaussian mode. Modeling the

{\mathrm{LG}}_{1}^{2}

beam as a superposition of LG modes, we find $(99.3\ifmmode\pm\else\textpm\fi{}0.9%)$ of the laser intensity in the

{\mathrm{LG}}_{1}^{2}

mode, a mode purity greater than for LG beams created by other methods external to the laser cavity. The high mode purity may be useful in making atom traps for precision measurements and for Bose-Einstein condensation.