Sub-micron spin-based magnetic field imaging with an organic light emitting diode

Rugang Geng, Adrian Mena, William J. Pappas and Dane R. McCamey ()
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Rugang Geng: UNSW Sydney
Adrian Mena: UNSW Sydney
William J. Pappas: UNSW Sydney
Dane R. McCamey: UNSW Sydney

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract Quantum sensing and imaging of magnetic fields has attracted broad interests due to its potential for high sensitivity and spatial resolution. Common systems used for quantum sensing require either optical excitation (e.g., nitrogen-vacancy centres in diamond, atomic vapor magnetometers), or cryogenic temperatures (e.g., SQUIDs, superconducting qubits), which pose challenges for chip-scale integration and commercial scalability. Here, we demonstrate an integrated organic light emitting diode (OLED) based solid-state sensor for magnetic field imaging, which employs spatially resolved magnetic resonance to provide a robust mapping of magnetic fields. By considering the monolithic OLED as an array of individual virtual sensors, we achieve sub-micron magnetic field mapping with field sensitivity of ~160 µT Hz−1/2 µm−2. Our work demonstrates a chip-scale OLED-based laser free magnetic field sensor and an approach to magnetic field mapping built on a commercially relevant and manufacturable technology.

Date: 2023
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DOI: 10.1038/s41467-023-37090-y

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