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Related Experiment Video

Updated: Apr 7, 2026

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

An atomic magnetometer with autonomous frequency stabilization and large dynamic range.

S Pradhan¹, S Mishra¹, R Behera¹

¹Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai 85, India.

The Review of Scientific Instruments

|July 3, 2015

Summary

This summary is machine-generated.

This study demonstrates a highly sensitive atomic magnetometer using polarized light for precise magnetic field measurements. The device achieves excellent sensitivity and an improved dynamic range for compact operation.

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Area of Science:

Atomic physics
Quantum optics
Magnetometry

Background:

Atomic magnetometers offer high sensitivity for magnetic field detection.
Previous designs often require complex laser frequency stabilization systems.

Purpose of the Study:

To demonstrate a compact and highly sensitive atomic magnetometer.
To improve the dynamic range of atomic magnetometers without sacrificing sensitivity.

Main Methods:

Utilizing elliptically polarized resonant light for measurements.
Employing polarimetric detection of zero magnetic field resonance in two-level systems.
Implementing autonomous laser frequency stabilization using transmitted light and magnetic field measurement with reflected light.

Main Results:

Demonstrated a preliminary sensitivity of less than 10 pT/Hz(1/2) @ 1 Hz.
Achieved autonomous laser frequency stabilization for compact device operation.
Enhanced the dynamic range through feedback control of the bias magnetic field.

Conclusions:

The developed atomic magnetometer is highly sensitive and compact.
The integrated frequency stabilization and dynamic range enhancement offer practical advantages for magnetic field sensing applications.