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Spatially resolved photoionization of ultracold atoms on an atom chip

, , , and . Physical Review A (Atomic, Molecular, and Optical Physics), (2007)
DOI: 10.1103/physreva.75.063605

Abstract

We report on photoionization of ultracold magnetically trapped Rb atoms on an atom chip. The atoms are trapped at 5  µK in a strongly anisotropic trap. Through a hole in the chip with a diameter of 150  µm, two laser beams are focused 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 photoionized. Ionization leads to depletion of the atomic density distribution observed by absorption imaging. The resonan…(more)

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