Isotropic magnetometry with simultaneous excitation of orientation and alignment CPT resonances

Details Isotropic magnetometry with simultaneous excitation of orientation and alignment CPT resonances Isotropic magnetometry with simultaneous excitation of orientation and alignment CPT resonances

2010-01-03

arxiv.org/abs/1001.0345v1

Physics

Atomic Physics

4 pages, 4 figures

Scientific paper

Atomic magnetometers have very high absolute precision and sensitivity to magnetic fields but suffer from a fundamental problem: the vectorial or tensorial interaction of light with atoms leads to "dead zones", certain orientations of magnetic field where the magnetometer loses its sensitivity. We demonstrate a simple polarization modulation scheme that simultaneously creates coherent population trapping (CPT) in orientation and alignment, thereby eliminating dead zones. Using $^{87}$Rb in a 10 Torr buffer gas cell we measure narrow, high-contrast CPT transparency peaks in all orientations and also show absence of systematic effects associated with non-linear Zeeman splitting.

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