Dresden 2020 – scientific programme
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MA: Fachverband Magnetismus
MA 57: Posters Magnetism II
MA 57.34: Poster
Thursday, March 19, 2020, 15:00–18:00, P3
Optimal control assisted widefield magnetometry with nitrogen vacancy centers in diamond — •Eva Florina Großmann1, Gerhard Wolff1, Philipp Jan Vetter1, Marco Rossignolo1,2, Thomas Reisser3,4, Tommaso Calarco3,4, Simone Montangero2, and Fedor Jelezko1 — 1Insitut für Quantenoptik, Universität Ulm, 89073 Ulm, Germany — 2Dipartimento di Fisica e Astronomia G. Galilei, Università degli Studi di Padova, I-35131 Padova, Italy — 3Forschungszentrum Jülich, Institute of Quantum Control (PGI-8), 52425 Jülich, Germany — 4Institute for Theoretical Physics, University of Cologne, 50937 Cologne, Germany
The nitrogen vacancy (NV) center, a point defect in the diamond lattice, offers a remarkable high magnetic sensitivity with low detection volumes. Moving from single NVs to ensemble NVs increases the magnetic sensitivity even further. Aiming at large-scale NMR with NV centers we make use of the widefield imaging technique. This technique requires homogeneous illumination as well as qubit control in form of microwave fields. Therefore, we design homogeneous magnetic AC fields by combining novel microwave structures and optimized microwave pulses, to collectively control the NVs. Apart from the significantly larger sensing area, this technique further allows a much faster acquisition time.