Zero-field optical magnetometer based on spin-alignment
- URL: http://arxiv.org/abs/2308.12233v1
- Date: Wed, 23 Aug 2023 16:15:10 GMT
- Title: Zero-field optical magnetometer based on spin-alignment
- Authors: Adil Meraki, Lucy Elson, Nok Ho, Ali Akbar, Marcin Ko\'zbia{\l}, Jan
Ko{\l}ody\'nski and Kasper Jensen
- Abstract summary: This research focuses on utilizing a spin-aligned atomic ensemble for magnetometry at zero-field.
The sensitivity and bandwidth of the magnetometer are characterized based on the detected polarization rotation signal.
Lastly, the practical utility of the magnetometer for medical applications is demonstrated by successfully detecting a synthetic cardiac signal.
- Score: 0.2407976495888858
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Optically-pumped magnetometers are an important instrument for imaging
biological magnetic signals without the need for cryogenic cooling. These
magnetometers are presently available in the commercial market and utilize the
principles of atomic alignment or orientation, enabling remarkable sensitivity
and precision in the measurement of magnetic fields. This research focuses on
utilizing a spin-aligned atomic ensemble for magnetometry at zero-field. A
novel approach is introduced, which involves evaluating how the linear
polarization of light rotates as it passes through the atomic vapor to null the
magnetic field. Analytical expressions are derived for the resulting spin
alignment and photodetection signals. Experimental results are provided,
demonstrating good agreement with the theoretical predictions. The sensitivity
and bandwidth of the magnetometer are characterized based on the detected
polarization rotation signal. Lastly, the practical utility of the magnetometer
for medical applications is demonstrated by successfully detecting a synthetic
cardiac signal.
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