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OSA Advanced Photonics Congress

Chip-scale optics for atomic magnetometry

Xuting Yang, Sarah Francis, Meryem Benelajla, Jennifer T. Choy

Published Jan 1, 2021• 1 citation
Publisher

Abstract

We develop metasurface-based nanophotonic components for polarization rotation and polarimetry of atomic spins in a compact rubidium-based magnetometer.
DOI
10.1364/noma.2021.notu3d.4

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Atomic magnetometry is one of the most sensitive field-measurement techniques for biological, geo-surveying, and navigational applications. An essential process in atomic magnetometry is measurement of optical polarization rotation of a near-resonant beam due to its interaction with atomic spins under an external magnetic field. In this work, we present the design and analysis of a silicon-metasurface-based polarization beam splitter that have been tailored for operation in a rubidium magnetometer. The metasurface polarization beam splitter operates at a wavelength of 795 nm and has a transmission efficiency > 83% and a polarization extinction ratio > 20 dB. We show that these performance specifications are compatible with magnetometer operation in miniaturized vapor cells with sub-picotesla-level sensitivity and discuss the prospect of realizing compact, high-sensitivity atomic magnetometers with nanophotonic component integration.
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