Demonstration of a state-insensitive, compensated nanofiber trap

A. Goban*, K. S. Choi, D. J. Alton, D. Ding, C. Lacroûte, M. Pototschnig, T. Thiele, N. P. Stern, H. J. Kimble

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

282 Scopus citations


We report the experimental realization of an optical trap that localizes single Cs atoms 215nm 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±0.1MHz for the Cs 6S 1/2, F=4→6P 3/2, F =5 transition, where Γ 0/ 2π=5.2MHz in free space. An optical depth d66 is observed, corresponding to an optical depth per atom d 10.08. These advances provide an important capability for the implementation of functional quantum optical networks and precision atomic spectroscopy near dielectric surfaces.

Original languageEnglish (US)
Article number033603
JournalPhysical review letters
Issue number3
StatePublished - Jul 19 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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