Single-beam, dark toroidal optical traps for cold atoms

Fredrik K. Fatemi; Spencer E. Olson; Mark Bashkansky; Zachary Dutton; Matthew Terraciano

doi:10.1117/12.701078

9 February 2007 Single-beam, dark toroidal optical traps for cold atoms

Fredrik K. Fatemi, Spencer E. Olson, Mark Bashkansky, Zachary Dutton, Matthew Terraciano

Proceedings Volume 6483, Complex Light and Optical Forces; 648307 (2007) https://doi.org/10.1117/12.701078
Event: Integrated Optoelectronic Devices 2007, 2007, San Jose, California, United States

Abstract

We demonstrate the generation of single-beam dark toroidal optical intensity distributions, which are of interest for neutral atom storage and atom interferometry. We demonstrate experimentally and numerically optical potentials that contain a ring-shaped intensity minimum, bounded in all directions by higher intensity. We use a spatial light modulator to alter the phase of an incident laser beam, and analyze the resulting optical propagation characteristics. For small toroidal traps (< 50 &mgr;m diameter), we find an optimal superposition of Laguerre-Gaussian modes that allows the formation of single-beam toroidal traps. We generate larger toroidal bottle traps by focusing hollow beams with toroidal lenses imprinted onto the spatial light modulator.

Citation Download Citation

Fredrik K. Fatemi, Spencer E. Olson, Mark Bashkansky, Zachary Dutton, and Matthew Terraciano "Single-beam, dark toroidal optical traps for cold atoms", Proc. SPIE 6483, Complex Light and Optical Forces, 648307 (9 February 2007); https://doi.org/10.1117/12.701078

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