Demonstration of a state-insensitive, compensated nanofiber trap.

  title={Demonstration of a state-insensitive, compensated nanofiber trap.},
  author={A. Goban and K. S. Choi and Daniel J. Alton and D. W. Ding and Cl{\'e}ment Lacro{\^u}te and Martin Pototschnig and Tobias Thiele and Nathaniel P. Stern and Harry J. Kimble},
  journal={Physical review letters},
  volume={109 3},
We report the experimental realization of an optical trap that localizes single Cs atoms ≃215  nm from the surface of a dielectric nanofiber. By operating at magic wavelengths for pairs of counterpropagating red- and blue-detuned trapping beams, differential scalar light shifts are eliminated, and vector shifts are suppressed by ≈250. We thereby measure an absorption linewidth Γ/2π=5.7±0.1  MHz for the Cs 6S(1/2), F=4→6P(3/2), F'=5 transition, where Γ0/2π=5.2  MHz in free space. An optical… 

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