Heidelberg 2015 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 7: Poster: Atomic systems in external fields
A 7.8: Poster
Montag, 23. März 2015, 17:00–19:00, C/Foyer
Exploiting light-shift effects for atomic magnetometry — •Arne Wickenbrock1, Elena Zhivun2, Brian Patton2,3, and Dmitry Budker1,4,5 — 1Johannes Gutenberg Universität, Mainz, Germany — 2University of California, Berkeley, California, USA — 3Technische Universität München, Garching, Germany — 4Helmholtz Institut Mainz, Mainz, Germany — 5Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
We demonstrate a selection of experiments exploiting vector light shift effects for atomic magnetometry. The fictitious magnetic fields of two circular polarized laser beams are used to transform a scalar magnetometer with fT sensitivity to an all-optical vector magnetometer. The sensor exhibits a projected sensitivity of 12 fT/Hz1/2 and 5 microrad/Hz1/2. A second experiment demonstrates a novel approach to all-optical magnetometry with potential advantages for magnetometer arrays and magnetically sensitive fundamental physics experiments. Intensity modulation of a laser beam at the Larmor frequency directly drives a narrow magnetic resonance in alkali vapor. As a magnetometer the setup achieves a projected shot-noise-limited sensitivity of 1.7 fT/Hz1/2 and measures a technical noise floor of 40 fT/Hz1/2. These results are essentially identical to a coil-driven scalar magnetometer using the same setup.