Development of a Vector Magnetometer based on Electromagnetically Induced Transparency in 87Rb Atomic Vapor
Date Thesis Awarded
Honors Thesis -- Open Access
Bachelors of Science (BS)
We present progress towards the development of an atomic magnetometer capable of accurate scalar and vector magnetic field measurements with high sensitivity and no need for external calibration. The proposed device will use the interaction between a bi-chromatic laser field and rubidium vapor to derive magnetic field magnitude and direction from measured amplitudes of Electromagnetically Induced Transparency (EIT) resonances. Since the proposed method requires precision control of light polarization, we observe the performance capabilities of a liquid crystal device to dynamically rotate the polarization of the laser field. Another goal in this project is to establish a polarization locking mechanism that tracks the magnetic field's azimuthal angle for streamlined measurement. Finally, we realize methods to derive the field's polar angle from comparisons of EIT resonance strengths. The work completed herein will inform the greater project's noise reduction, component manufacturing, and device refinement steps that aim to produce the first compact, accurate, and unobtrusive vector magnetometer.
Toyryla, Alexander, "Development of a Vector Magnetometer based on Electromagnetically Induced Transparency in 87Rb Atomic Vapor" (2022). Undergraduate Honors Theses. William & Mary. Paper 1778.
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