Dispersive optical interface based on nanofiber-trapped atoms.

  title={Dispersive optical interface based on nanofiber-trapped atoms.},
  author={Samuel T. Dawkins and R. Mitsch and D. Reitz and Eugen Vetsch and Arno Rauschenbeutel},
  journal={Physical review letters},
  volume={107 24},
We dispersively interface an ensemble of 1000 atoms trapped in the evanescent field surrounding a tapered optical nanofiber. This method relies on the azimuthally asymmetric coupling of the ensemble with the evanescent field of an off-resonant probe beam, transmitted through the nanofiber. The resulting birefringence and dispersion are significant; we observe a phase shift per atom of ∼1  mrad at a detuning of 6 times the natural linewidth, corresponding to an effective resonant optical density… 

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