Gradiometry-free noise suppression in RF atomic magnetometers

Abstract

We demonstrate the sensitivity of a sensor based on an optically-pumped radio-frequency (RF) atomic magnetometer to the polarization state of the detected RF magnetic field, and measure $>$36 dB difference in amplitude sensitivity for opposite circular field polarizations. This sensitivity could be used to create novel sensors that would allow signal detection while suppressing the ambient noise, regardless of the distance between the sources of signal and noise, in contrast to traditional gradiometry configurations. Additionally, such sensor will be orientation-sensitive, as the phase of the detected signal is shown to depend on the angle between the sensor's detection axis and the direction to the transmitter.

References in corpus (5)

• Optical Magnetometry
• Sub-femtotesla scalar atomic magnetometer using multipass cells
• NMR detection with an atomic magnetometer
• Detection of NMR signals with a radio-frequency atomic magnetometer
• Electromagnetic induction imaging with a radio-frequency atomic magnetometer

Cited by in corpus (7)

• Magnetic Jones Vector Detection with RF Atomic Magnetometers
• Polarisation of radio-frequency magnetic fields in magnetic induction measurements with an atomic magnetometer
• Performance of a radio-frequency two-photon atomic magnetometer in different magnetic induction measurement geometries
• Spurious Ferromagnetic Remanence Detected by Hybrid Magnetometer
• Tri-axial time-dependent magnetic field calibrated in-situ by harmonic analysis of adiabatically evolving atomic spins
• Electromagnetic Induction Imaging: Signal Detection Based on Tuned-Dressed Optical Magnetometry
• Resonant Very Low- and Ultra Low Frequency Digital Signal Reception Using a Portable Atomic Magnetometer