Vector Atomic Magnetometer with Free Induction Decay Detection Based on a Microfabricated Vapor Cell
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Updated: May 31, 2025

Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene
Published on: July 3, 2015
Pengbo Jiang1, Qi Li2, Jianan Qin1
1Center for Advanced Measurement Science, National Institute of Metrology, Beijing 100029, China.
Abstract:
Atomic magnetometers are highly sensitive instruments widely used for measurements of weak magnetic field. Extracting vector information while maintaining high-precision scalar detection has become the trend in atomic magnetometer development. We introduce a vector atomic magnetometer containing a 5 mm-thick microfabricated vapor cell operating in free-induction-decay mode. By employing orthogonal modulation techniques, the system achieves high-precision in-plane vector magnetic field measurements. The high-precision vector magnetic field measurements are demonstrated in the x-z plane. The sensitivity of the total field detection in the miniaturized atomic magnetometer is 30 pT·Hz-1/2 @11 µT. The average angular error of the decoupled measurement is as low as 4.7 mrad @7.6 µT for vector magnetic fields, providing a new approach for vector magnetic field measurement in miniaturized atomic magnetometers.
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