Spatially resolved photo ionization of ultracold atoms on an atom chip

Abstract

We report on photo ionization of ultracold magnetically trapped Rb atoms on an atom chip. The atoms are trapped at 5 $\mu$K in a strongly anisotropic trap. Through a hole in the chip with a diameter of 150 $\mu$m two laser beams are focussed onto a fraction of the atomic cloud. A first laser beam with a wavelength of 778 nm excites the atoms via a two photon transition to the 5D level. With a fiber laser at 1080 nm the excited atoms are photo ionized. Ionization leads to depletion of the atomic density distribution observed by absorption imaging. The resonant ionization spectrum is reported. The setup used in this experiment is not only suitable to investigate BEC ion mixtures but also single atom detection on an atom chip.

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Cited by in corpus (7)

• Single atom detection in ultracold quantum gases: a review of current progress
• Absorption Imaging of Ultracold Atoms on Atom Chips
• A Stark decelerator on a chip
• Doppler-free two-photon resonances for atom detection and sum frequency stabilization
• Ion detection in the photoionization of a Rb Bose-Einstein condensate
• Pairing mean-field theory for the dynamics of dissociation of molecular Bose-Einstein condensates
• Calibration of a single atom detector for atomic micro chips