Extending dark optical trapping geometries

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New counter propagating geometries are presented for localizing 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.

Original languageEnglish
Pages (from-to)2505-2507
Number of pages3
JournalOptics Letters
Issue number13
Publication statusPublished - 1 Jul 2012


  • counterpropagating geometries
  • ultracold atoms
  • Laguerre-Gaussian laser beams
  • optical revolver
  • zero differential light shifts
  • dark optical trapping geometries


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