Chip-scale optics for balanced polarimetry in atomic magnetometry

• URL: http://arxiv.org/abs/2210.04952v1
• Date: Mon, 10 Oct 2022 18:43:36 GMT
• Title: Chip-scale optics for balanced polarimetry in atomic magnetometry
• Authors: Xuting Yang, Meryem Benelajla, Jennifer T. Choy
• Abstract summary: A silicon-metasurface-based polarization beam splitter has 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%. We show that these performance specifications are compatible with magnetometer operation in miniaturized vapor cells with subpicotesla-level sensitivity.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Atomic magnetometry is one of the most sensitive field-measurement techniques for biological, geo-surveying, and navigation 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 > 100. We show that these performance specifications are compatible with magnetometer operation in miniaturized vapor cells with subpicotesla-level sensitivity and discuss the prospect of realizing compact, high-sensitivity atomic magnetometers with nanophotonic component integration.

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