Isotropic magnetometry with simultaneous excitation of orientation and alignment CPT resonances

Abstract

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.

4 pages, 4 figures

References in corpus (3)

• High-Temperature Alkali Vapor Cells with Anti-Relaxation Surface Coatings
• Synchronous Optical Pumping of Quantum Revival Beats for Atomic Magnetometery
• Preparation and Determination of Spin-Polarized States in Multi-Zeeman-sublevel Atoms

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