2024/03/08 by Ali Akbar, Akbar, A., M. Koźbiał +9
Biochemistry, Genetics and Molecular Biology · Engineering · #Atomic Physics (physics.atom-ph) #Characterization and Applications of Magnetic Nanoparticles #FOS: Physical sciences #Geomagnetism and Paleomagnetism Studies #Magnetic Field Sensors Techniques #Optics (physics.optics)
paper · pdf · doi:10.48550/arxiv.2403.05357
openalex publication_date 2024/03/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/03
In this work, we present a comprehensive and comparative analysis of two detection modalities, i.e., polarization rotation and absorption measurement of light, for a double resonance alignment based optical magnetometer (DRAM). We derive algebraic expressions for magnetometry signals based on multipole moments description. Experiments are carried out using a room-temperature paraffin-coated Caesium vapour cell and measuring either the polarization rotation or absorption of the transmitted laser light. A detailed experimental analysis of the resonance spectra is performed to validate the theoretical findings for various input parameters. The results signify the use of a single isotropic relaxation rate thus simplifying the data analysis for optimization of the DRAM. The sensitivity measurements are performed and reveal that the polarization rotation detection mode yields larger signals and better sensitivity than absorption measurement of light.