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We report the experimental realization of an optical trap that localizessingle Cs atoms ~215 nm from surface of a dielectric nanofiber. By operating atmagic wavelengths for pairs of counter-propagating red- and blue-detunedtrapping beams, differential scalar light shifts are eliminated, and vectorshifts are suppressed by ~250. We thereby measure an absorption linewidth\Gamma/2\pi = 5.7 \pm 0.1 MHz for the Cs 6S1/2,F=4 - 6P3/2,F'=5 transition,where \Gamma/2\pi = 5.2 MHz in free space. Optical depth d~66 is observed,corresponding to an optical depth per atom d_1~0.08. These advances provide animportant capability for the implementation of functional quantum opticalnetworks and precision atomic spectroscopy near dielectric surfaces.

Demonstration of a state-insensitive, compensated nanofiber trap