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Updated: Aug 1, 2025

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
Heading-Error-Free Optical Atomic Magnetometry in the Earth-Field Range
Rui Zhang1,2,3, Dimitra Kanta2,3, Arne Wickenbrock2,3
1State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronics, and Center for Quantum Information Technology, Peking University, Beijing 100871, China.
Abstract:
We demonstrate an alignment-based ^{87}Rb magnetometer that is immune to nonlinear Zeeman (NLZ) splitting, addressing an important problem in alkali-metal atomic magnetometry. In our scheme, there is a single magnetic resonance peak and well-separated hyperfine transition frequencies, making the magnetometer insensitive or even immune to NLZ-related heading errors. It is shown that the magnetometer can be implemented for practical measurements in geomagnetic environments, and the photon-shot-noise-limited sensitivity reaches 9 fT/sqrt[Hz] at 5 μT and remains at tens of fT/sqrt[Hz] at 50 μT at room temperature.
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