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Dresden 2011 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 5: Ultracold Atoms: Manipulation and Detection

Q 5.4: Talk

Monday, March 14, 2011, 11:15–11:30, SCH 251

Imaging of microwave fields using ultracold atoms — •Pascal Böhi1, Max Riedel1, Theodor Hänsch2, and Philipp Treutlein11Departement Physik, Universität Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland — 2Max-Planck-Institut für Quantenoptik and Ludwig-Maximilians-Universität, München, Germany

Clouds of ultracold atoms are used as highly sensitive, tunable and non-invasive probes for microwave field imaging with micrometer spatial resolution. The microwave magnetic field drives Rabi oscillations on atomic hyperfine transitions which are read out using state-selective absorption imaging. It is possible to fully reconstruct the microwave magnetic field, including the microwave phase distribution. We use this method to determine the microwave near-field distribution around a coplanar waveguide which is integrated on an atom chip. We compare the extracted microwave field to simulations to deduce the microwave current distribution on the waveguide.
[1] P. Böhi et al., Appl. Phys. Lett. 97, 051101 (2010).

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