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Quantitative study of the response of a single NV defect in diamond to magnetic noise

Abstract : The nitrogen-vacancy (NV) defect in diamond is an efficient quantum sensor of randomly fluctuating signals via relaxometry measurements. In particular, the longitudinal spin relaxation of the NV defect accelerates in the presence of magnetic noise with a spectral component at its electron spin resonance frequency.We look into this effect quantitatively by applying a calibrated and tunable magnetic noise on a single NV defect.We show that an increase of the longitudinal spin relaxation rate translates into a reduction of the photoluminescence (PL) signal emitted under continuous optical illumination, which can be explained using a simplified three-level model of the NV defect. This PL quenching mechanism offers a simple, all-optical method to detect magnetic noise sources at the nanoscale.
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https://hal.archives-ouvertes.fr/hal-03295925
Contributor : L2c Aigle <>
Submitted on : Thursday, July 22, 2021 - 2:16:00 PM
Last modification on : Saturday, July 24, 2021 - 3:44:57 AM

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Maxime Rollo, Aurore Finco, Rana Tanos, Florentin Fabre, Thibaut Devolder, et al.. Quantitative study of the response of a single NV defect in diamond to magnetic noise. Physical Review B: Condensed Matter (1978-1997), American Physical Society, 2021, 103 (23), pp.235418. ⟨10.1103/PhysRevB.103.235418⟩. ⟨hal-03295925⟩

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