Atom-trapping in the Lamb-Dicke regime in a far-off-resonance optical lattice

David L. Haycock; Steven E. Hamann; Gerd Klose; Poul S. Jessen

doi:10.1117/12.273754

1 May 1997 Atom-trapping in the Lamb-Dicke regime in a far-off-resonance optical lattice

David L. Haycock, Steven E. Hamann, Gerd Klose, Poul S. Jessen

Proceedings Volume 2995, Atom Optics; (1997) https://doi.org/10.1117/12.273754
Event: Photonics West '97, 1997, San Jose, CA, United States

Abstract

We form a 1D optical lattices for Cs atoms using light tuned a few thousand linewidths below the 6S_1/2(F equals 4) yields 6P_3/2(F' equals 5) transition at 852 nm. In this far-off- resonance lattice the time scale for damping of motional coherences and kinetic energy can be orders of magnitude longer than the vibrational oscillation period for atoms trapped in the lattice potential wells. Atoms are loaded directly into deeply bound states, by adiabatic transfer from a superimposed, near-resonance optical lattice. This yields a mean vibrational excitation n approximately equals 0.3, and localization (Delta) z approximately (lambda) /20 deep in the Lamb-Dicke regime. Light scattering subsequently heats the atoms, but the initial rate is only of order 10^-3 vibrational quanta per oscillation period. Low vibrational excitation, localization in the Lamb-Dicke regime and low heating rates make these atoms good candidates for resolved- sideband Raman cooling, and for the generation and study of non-classical states of center-of-mass motion. We propose a scheme for resolved-sideband Raman cooling and quantum state preparation; the scheme employs Raman coupling between magnetic sublevels induced by the lattice light field itself.

Citation Download Citation

David L. Haycock, Steven E. Hamann, Gerd Klose, and Poul S. Jessen "Atom-trapping in the Lamb-Dicke regime in a far-off-resonance optical lattice", Proc. SPIE 2995, Atom Optics, (1 May 1997); https://doi.org/10.1117/12.273754

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