Scientific Results

Magnetic induction imaging with a cold-atom radio frequency magnetometer

Year: 2020

Authors: Fregosi A., Gabbanini C., Gozzini S., Lenci L., Marinelli C., Fioretti A.

Autors Affiliation: Istituto Nazionale di Ottica, CNR-INO, via Moruzzi 1, 56124 Pisa, Italy; Department of Physical Sciences, Earth and Environment, University of Siena, via Roma 56, 53100 Siena, Italy; Facultad de Ingenierıa, Instituto de Fısica, Universidad de la Republica, J. Herrera y Reissig 565, 11300 Montevideo, Uruguay

Abstract: The sensitive detection of either static or radio frequency (RF) magnetic fields is essential to many fundamental studies and applications. Here, we demonstrate the operation of a cold-atom-based RF magnetometer in performing 1D and 2D imaging of small metallic objects. It is based on a cold 85Rb atomic sample and operates in an unshielded environment with no active field stabilization. It shows a sensitivity up to 200 pT / Hz in the 5-35 kHz bandwidth range and can resolve a 0.4mm wide cut in a 0.8mm thick metallic foil. The characteristics of our system make it a good candidate for applications in civil and industrial surveillance.

Journal/Review: APPLIED PHYSICS LETTERS

Volume: 117 (14)      Pages from: 144102-1  to: 144102-5

KeyWords: TOMOGRAPHY; ARRAY
DOI: 10.1063/5.0020415

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