AC-Stark shift and photoionization of Rydberg atoms in an optical dipole trap

Details AC-Stark shift and photoionization of Rydberg atoms in an optical dipole trap AC-Stark shift and photoionization of Rydberg atoms in an optical dipole trap

2010-11-03

arxiv.org/abs/1011.0837v1

F Markert et al 2010 New J. Phys. 12 113003

Physics

Atomic Physics

Scientific paper

10.1088/1367-2630/12/11/113003

We have measured the AC-Stark shift of the $14D_{5/2}$ Rydberg state of rubidium 87 in an optical dipole trap formed by a focussed CO$_2$-laser. We find good quantitative agreement with the model of a free electron experiencing a ponderomotive potential in the light field. In order to reproduce the observed spectra we take into account the broadening of the Rydberg state due to photoionization. The extracted cross-section is compatible with previous measurements on neighboring Rydberg states.

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