Microscopic magnetic field imaging with hot atoms via single-pixel imaging

TL;DR

This paper presents a novel method combining single-pixel imaging with hot atomic vapor sensors to achieve microscopic magnetic field imaging with a resolution of approximately 62.5 micrometers.

Contribution

It introduces a new approach for high-resolution magnetic field imaging using SPI techniques with atomic vapor sensors, overcoming previous resolution limitations.

Findings

Achieved magnetic field imaging with ~62.5 μm resolution.

Demonstrated the method without magnetic shielding.

Resolved magnetic fields using a DMD projection system.

Abstract

In recent years, sensors based on hot atomic vapor cells have emerged as a compact and highly sensitive means of measuring magnetic fields. Such sensors have been deployed in the field for the measurement of, e.g. biological systems, representing a promising practical application of quantum technologies. However, it remains challenging to obtain high-resolution magnetic field images from these sensors, and in most cases the spatial resolution of the system is limited by the sensor size. Here, we demonstrate the combination of single-pixel imaging (SPI) techniques with an atom vapor. Faraday magnetometer to achieve microscopic magnetic field imaging. We demonstrate magnetic field imaging with a spatial resolution of $\approx~62.5\mu m$, limited only by the resolution of our DMD projection system and the absence of magnetic shielding in our experimental setup.