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A: Fachverband Atomphysik

A 28: Poster Session - Atomic Physics IV

A 28.13: Poster

Donnerstag, 12. März 2020, 16:00–18:00, Empore Lichthof

Setting up a sideband system and a digital ion trap in an atom-ion hybrid experiment — •Dominik Dorer, Shinsuke Haze, Joschka Wolf, Markus Deiss, and Johannes Hecker Denschlag — Institut für Quantenmaterie, Universität Ulm, 89069 Ulm, Germany

We report on two ongoing projects in our atom-ion hybrid trap experiment. First, we want to present the progress for implementing a resolved sideband cooling system for ¹³⁸Ba⁺ ions. For this we implement a narrow band laser addressing the 6S_1/2→ 5D_5/2 shelving transition at 1762 nm. To achieve a linewidth much smaller than the typical trapping frequencies of our Paul trap (40 kHz) and a daily frequency shift in the sub kHz-regime, we set up a high-Q optical cavity made of ultra low expansion glass. We tested this optical cavity and have carried out first measurements of the shelving transition.

Second, we present our approach to realize a digital ion trap, which we want to use to perform Stark spectroscopy of Rydberg atoms in the electric field of trapped ions [1]. The strategy is to pulse the Rydberg excitation laser in periods where there is no electric field of the ion trap.

[1] S. Haze et al., arXiv 1901.11069 (2019)