Counting atoms in a deep optical microtrap

Details Counting atoms in a deep optical microtrap Counting atoms in a deep optical microtrap

2010-11-25

arxiv.org/abs/1011.5538v2

Optics Letters, Vol. 36, Issue 7, pp. 1041-1043 (2011)

Physics

Optics

Scientific paper

10.1364/OL.36.001041

We demonstrate a method to count small numbers of atoms held in a deep, microscopic optical dipole trap by collecting fluorescence from atoms exposed to a standing wave of light that is blue detuned from resonance. While scattering photons, the atoms are also cooled by a Sisyphus mechanism that results from the spatial variation in light intensity. The use of a small blue detuning limits the losses due to light assisted collisions, thereby making the method suitable for counting several atoms in a microscopic volume.

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