Freiburg 2024 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 56: Poster VII

Q 56.38: Poster

Donnerstag, 14. März 2024, 17:00–19:00, KG I Foyer

Nigtrogen vacancy center based magnetometer and gradiometer — •JIxing Zhang, Michael Kuebler, Magnus Benke, Yihua Wang, Anjana Karuvayalil, and Joerg Wrachtrup — 3rd Institute of Physics, University of Stuttgart, 70569 Stuttgart, Germany

Diamond nitrogen vacancy (NV) centers have emerged as a promising platform for quantum sensing with diverse applications spanning multiple disciplines. This research focuses on harnessing the unique capabilities of high-concentration NV centers to achieve unparalleled sensitivity in magnetometry, thereby unlocking significant potential for magnetic measurements. In comparison to established magnetometry technologies like SQUID and OPM, NV-based magnetometry stands out by offering a larger dynamic range, enhanced bandwidth, and superior spatial resolution. This abstract introduces a novel magnetic gradiometer, comprising two NV-based magnetometers strategically designed to resolve weak magnetic signals from a test object amid challenging high environmental magnetic field noise conditions. The study showcases the design principles and presents compelling measurement results for the NV ensemble gradiometer. Our findings highlight its remarkable potential for capturing magnetic signals associated with human muscle and brain activity. This breakthrough not only underscores the versatility of NV-based magnetometry but also positions it as a transformative technology for advancing our understanding of complex biological processes.

Keywords: nitrogen vacancy center; magnetometer; gradiometer; ensemble; electron spin