Magnetic characterization of electronic components for portable atomic sensors using a zero-field optically pumped magnetometry platform
Abstract
We present a zero-field optically pumped magnetometry platform for magnetic characterization of a photodetector (PD) board and a resistance temperature detector (RTD) used in a portable atomic magnetometer. For each component, the static magnetic field along the measurement axis is determined from the shift in the center of the dispersive response, while response distortion caused by off-axis magnetic-field components is assessed from the absorptive admixture. Magnetic-field noise is evaluated based on the quadrature difference in the amplitude spectral density (ASD). The platform achieved a -3 dB bandwidth of 71.5 Hz and a median ASD of 57.6 fT/√(Hz) over 20-70 Hz. For the unpowered PD board, static magnetic fields of approximately 8 nT in magnitude and opposite signs were measured in the front- and back-facing orientations. The back-facing orientation also exhibited a degraded dispersive response consistent with magnetic-field inhomogeneity. The magnetic-noise contributions associated with the PD board were estimated at 36.0 and 63.2 fT/√(Hz) in the front- and back-facing orientations, respectively. By contrast, operation of the RTD readout generated a static magnetic field of -0.6 nT, with no measurable response degradation or additional magnetic-field noise. These results provide guidance for the design and placement of electronic components in portable atomic magnetometers targeting sensitivities below 0.1 pT/√(Hz).
Related
- Solid-state nuclear magnetic resonance search for axion-like dark matter with broadband SQUID magnetometry
- Continuous-wave AC magnetometry up to hundreds of megahertz using nitrogen-vacancy centers under a strong transverse magnetic field
- Magnetic Anisotropy and Magnetization Dynamics in Si/Ni Multilayers Probed by FMR and VSM Magnetometry
- Ferron polariton Hall effect: Deflecting optically rectified polarization with magnetic fields
- Optically detected nuclear magnetic resonance of carbon-13 in bulk diamond
BibTeX
@misc{kim2026magnetic,
title = {{Magnetic characterization of electronic components for portable atomic sensors using a zero-field optically pumped magnetometry platform}},
author = {Hyeonjae Kim and Sangkyung Lee and Sin Hyuk Yim and Taek Jeong and Younghoon Lim},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.07270},
eprint = {2609.07270},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.07270},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Magnetic characterization of electronic components for portable atomic sensors using a zero-field optically pumped magnetometry platform
AU - Hyeonjae Kim
AU - Sangkyung Lee
AU - Sin Hyuk Yim
AU - Taek Jeong
AU - Younghoon Lim
PY - 2026
DA - 2026/09/07
PB - arXiv
DO - 10.48550/arxiv.2609.07270
UR - https://arxiv.org/abs/2609.07270
AB - We present a zero-field optically pumped magnetometry platform for magnetic characterization of a photodetector (PD) board and a resistance temperature detector (RTD) used in a portable atomic magnetometer. For each component, the static magnetic field along the measurement axis is determined from the shift in the center of the dispersive response, while response distortion caused by off-axis magnetic-field components is assessed from the absorptive admixture. Magnetic-field noise is evaluated based on the quadrature difference in the amplitude spectral density (ASD). The platform achieved a -3 dB bandwidth of 71.5 Hz and a median ASD of 57.6 fT/√(Hz) over 20-70 Hz. For the unpowered PD board, static magnetic fields of approximately 8 nT in magnitude and opposite signs were measured in the front- and back-facing orientations. The back-facing orientation also exhibited a degraded dispersive response consistent with magnetic-field inhomogeneity. The magnetic-noise contributions associated with the PD board were estimated at 36.0 and 63.2 fT/√(Hz) in the front- and back-facing orientations, respectively. By contrast, operation of the RTD readout generated a static magnetic field of -0.6 nT, with no measurable response degradation or additional magnetic-field noise. These results provide guidance for the design and placement of electronic components in portable atomic magnetometers targeting sensitivities below 0.1 pT/√(Hz).
ER -