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 depth d≃66 is observed, corresponding to an optical depth per atom d1≃0.08. These advances provide an important capability for the implementation of functional quantum optical networks and precision atomic spectroscopy near dielectric surfaces.
Demonstration of a state-insensitive, compensated nanofiber trap.
A. Goban,K. S. Choi,K. S. Choi,D. J. Alton,Ding Ding,C. Lacroûte,M. Pototschnig,T. Thiele,N. P. Stern,H. Kimble
Published 2012 in Physical Review Letters
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- Publication year
2012
- Venue
Physical Review Letters
- Publication date
2012-03-22
- Fields of study
Medicine, Physics
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Semantic Scholar, PubMed
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