IEEE International Conference on Micro Electro Mechanical Systems (MEMS)

Optimization of Beam Characteristics for Quantum Magnetometers Based on 3D Mems Alkali Vapor Cells

Wenqi Li, Jintang Shang

Published Jan 25, 2026• 0 citations

Abstract

This paper reports, for the first time, a systematic optimization of beam characteristics for quantum magnetometers utilizing 3D MEMS rubidium vapor cells. A novel single-beam quantum magnetometer is designed where the beam characteristics can be modified and characterized in situ. The optimized beam diameter exhibits more homogeneous spatial distribution, resulting in an increase of up to 327.3% for the polarization lifetime of the atomic ensemble within 3D MEMS vapor cells. In addition, the optimized beam diameter effectively increases the number of atoms interacting with photons, leading to an improvement of 962.5% in the response slope of the quantum magnetometer. The experimental results provide valuable insights and practical guidelines for the design of high-performance single-beam quantum magnetometers based on 3D MEMS alkali vapor cells.

DOI: 10.1109/mems64181.2026.11419071

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