Dresden 2011 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 3: Ultracold Atoms: Manipulation and Detection (with Q)
A 3.4: Vortrag
Montag, 14. März 2011, 11:15–11:30, SCH 251
Imaging of microwave fields using ultracold atoms — •Pascal Böhi1, Max Riedel1, Theodor Hänsch2, and Philipp Treutlein1 — 1Departement 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).