Workshop on optically-pumped magnetometers - WOPM2025

Session

OPM Development II

7 Aug 2025, 11:10

WHGA/001 - Auditorium (PSI)

Conveners

OPM Development II

• Svenja Knappe (University of Colorado)

78. High-resolution magnetic field imaging with a two-axis MEMS scanning mirror

Dominic Hunter (University of Strathclyde)

07/08/2025, 11:10

Oral presentation

We demonstrate high-resolution magnetic field imaging using a custom micro-machined cesium (Cs) vapor cell filled with nitrogen (N$_2$) buffer gas [1], incorporating automated spatial sampling via a two-axis MEMS scanning mirror. The cell utilizes advanced fabrication techniques that enable flexible and scalable geometries, making it well suited for a variety of applications, including...

10. Laser sealing for atomic devices

Linda Péroux (Université de Lille, CNRS, Centrale Lille, Université Polytechnique Hauts-de-France, UMR 8520 - IEMN - Institut d'Electronique de Microélectronique et de Nanotechnologie , Lille, France)

07/08/2025, 11:30

Oral presentation

Microfabricated alkali vapor cells are central to the development of compact and low-power atomic devices such as atomic clocks and optically pumped magnetometers (OPMs). However, conventional microfabrication techniques, particularly those relying on anodic bonding for final sealing, impose high temperatures that are incompatible with the integration of antirelaxation coatings.
In this work,...

81. Fabrication and Application: In-situ monitoring system for anti-relaxation coating atomic vapor cells

Wentian Xiang (Peking University)

07/08/2025, 11:50

Oral presentation

Anti-relaxation coating (ARC) vapor cells are a critical component in atomic physics and quantum sensing, yet their widespread adoption is hindered by short spin coherence times and low manufacturing yields, stemming from the lack of systematic preparation protocols. Herein, we present an in-situ monitoring system that enables real-time optimization of the spin coherence time and vapor density...

96. Spin noise spectroscopy of an alignment-based atomic magnetometer

Marcin Koźbiał (Centre of New Technologies, University of Warsaw)

07/08/2025, 12:10

Oral presentation

Optically pumped magnetometers (OPMs) are revolutionizing the task of magnetic-field sensing due to their extremely high sensitivity combined with technological improvements in miniaturization which have led to compact and portable devices. OPMs can be based on spin-oriented or spin-aligned atomic ensembles which are spin polarized through optical pumping with circular or linear polarized...