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A: Fachverband Atomphysik

A 4: Ultra-cold atoms, ions and BEC I (with Q)

A 4.3: Vortrag

Montag, 23. März 2015, 15:00–15:15, C/HSW

Saturation absorbtion imaging of dense atom clouds — •Bastian Höltkemeier, Henry Lopez, Julian Glässel, Pascal Weckesser, Stefan Paul, and Matthias Weidemüller — Physikalisches Institut, Universität Heidelberg, INF 226, 69120 Heidelberg

Imaging atomic samples with absorption imaging has become one of the standard techniques in atomic physics. Absorption imaging can be used for a wide range of atomic samples of very different densities. In this talk we will focus on imaging large and dense atom clouds with optical densities of about one hundred. In this case the sample becomes optically thick to the imaging transition which is a common problem of absorption imaging. In order to solve this problem we discuss possible approaches which can be used for such systems. The main idea is to decrease the atoms' absorption cross section and therefore reduce the measured optical thickness. The effective cross section is then characterized by saturated absorption imaging.