Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 38: Poster IV
Q 38.42: Poster
Mittwoch, 13. März 2024, 17:00–19:00, KG I Foyer
Excited state lifetime of NV-centers for magnetometry — •Ludwig Horsthemke1, Jens Pogorzelski1, Lutz Langguth3, Robert Staacke3, Markus Gregor2, and Peter Glösekötter1 — 1Department of Electrical Engineering and Computer Science, FH Münster University of Applied Sciences, Stegerwaldstraße 39, Steinfurt, Germany — 2Department of Engineering Physics, FH Münster University of Applied Sciences, Stegerwaldstraße 39, Steinfurt, Germany — 3Quantum Technologies GmbH, Alte Messe 6, Leipzig, Germany
Magnetic field sensing using nitrogen vacancy centers has attracted a lot of attention in the recent past. Approaches using microwave (MW) excitation realize high sensitivities and spatial resolutions. They are however limited in their application due to the necessity of MW delivery. In contrast all-optical approaches simplify the sensor design in a step towards industry application. They can be implemented using fiber optics to construct a non-magnetic, high insulation resistance probe and can thereby be applied in harsh environments. These designs still encounter challenges such as movement in the optical fiber or laser intensity noise, compromising the fluorescence signal. In this study we utilize the fluorescence lifetime as a non-intensity quantity for magnetic field sensing. The lifetimes show a good correlation with the intensity by a reduction with a contrast of 8.3% upon application of magnetic fields. The integration of this approach holds promise for advancing magnetic field sensing capabilities, particularly in environments where conventional methods face limitations.
Keywords: NV-center; lifetime; magnetometry