Dispersive Optical Interface Based on Nanofiber-Trapped Atoms

Author(s): S.T. Dawkins, R. Mitsch, D. Reitz, E. Vetsch, A. Rauschenbeutel

Journal: Physical Review Letters

Volume: 107

Page(s): 243601

Year: 2011

DOI Number: 10.1103/PhysRevLett.107.243601

Link: Link to publication


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 per atom of 0.027. Moreover, we utilize this strong dispersion to nondestructively determine the number of atoms.

Note: http://arxiv.org/abs/1108.2469

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