Interfacing light and single atoms with a lens

Details Interfacing light and single atoms with a lens Interfacing light and single atoms with a lens

2008-04-30

arxiv.org/abs/0804.4861v3

New J. Phys. 11, 043011 (2009)

Physics

Quantum Physics

22 pages, 7 figures; we provide now a closed solution for field at focus and coupling to single mode optical fibers, and inclu

Scientific paper

10.1088/1367-2630/11/4/043011

We characterize the interaction between a single atom or similar microscopic system and a light field via the scattering ratio. For that, we first derive the electrical field in a strongly focused Gaussian light beam, and then consider the atomic response. Following the simple scattering model, the fraction of scattered optical power for a weak coherent probe field leads to unphysical scattering ratios above 1 in the strong focusing regime. A refined model considering interference between exciting and scattered field into finite-sized detectors or optical fibers is presented, and compared to experimental extinction measurements for various focusing strengths.

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