Nanofiber-based optical trapping of cold neutral atoms

Details Nanofiber-based optical trapping of cold neutral atoms Nanofiber-based optical trapping of cold neutral atoms

2012-02-07

arxiv.org/abs/1202.1494v1

Physics

Quantum Physics

Scientific paper

We present experimental techniques and results related to the optimization and characterization of our nanofiber-based atom trap [Vetsch et al., Phys. Rev. Lett. 104, 203603 (2010)]. The atoms are confined in an optical lattice which is created using a two-color evanescent field surrounding the optical nanofiber. For this purpose, the polarization state of the trapping light fields has to be properly adjusted. We demonstrate that this can be accomplished by analyzing the light scattered by the nanofiber. Furthermore, we show that loading the nanofiber trap from a magneto-optical trap leads to sub-Doppler temperatures of the trapped atomic ensemble and yields a sub-Poissonian distribution of the number of trapped atoms per trapping site.

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