Dispersive Optical Interface Based on Nanofiber-Trapped Atoms

Details Dispersive Optical Interface Based on Nanofiber-Trapped Atoms Dispersive Optical Interface Based on Nanofiber-Trapped Atoms

2011-08-11

arxiv.org/abs/1108.2469v2

Phys. Rev. Lett. 107, 242601 (2011)

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.107.243601

We dispersively interface an ensemble of one thousand 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 $\sim$\,1\,mrad at a detuning of six times the natural linewidth, corresponding to an effective resonant optical density per atom of 0.027. Moreover, we utilize this strong dispersion to non-destructively determine the number of atoms.

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