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MA: Fachverband Magnetismus

MA 18: Magnetic Imaging and Sensors I

MA 18.3: Talk

Tuesday, March 19, 2024, 10:00–10:15, EB 301

High-resolution nanoscale NMR for arbitrary magnetic fields — •Rouven Maier¹, Cheng-I Ho², Jonas Meinel¹, Vadim Vorobyov¹, and Jörg Wrachtrup¹ — ¹3rd Institute of Physics, University of Stuttgart, Germany — ²Instititue of Organic Chemistry, University of Stuttgart, Germany

Nuclear magnetic resonance (NMR) spectroscopy poses one the most widely used spectroscopic techniques of modern times, with applications ranging from the serialized analysis of chemical structures at the molecular level to tissue imaging in clinical applications. However, the inherent insensitivity of conventional NMR spectroscopy prevents its use in studies of nanoscopic systems. By increasing the sensitivity by several orders of magnitude, nanoscale NMR spectroscopy based on the nitrogen vacancy (NV) center in diamond as quantum sensor has emerged as a promising research subject. Although recent developments of innovative NV-NMR detection schemes, such as the quantum-heterodyne (Qdyne) detection protocol enable high spectral resolutions, these schemes are inherently not applicable at high magnetic fields, to further improve the resolution and measurement times. Here we present a high-field compatible extension of the Qdyne measurement scheme by combining it with electron-nuclear-double-resonance (ENDOR) sequences. This approach paves the way for the application of NV-NMR spectroscopy in nano-scale studies of biomolecules and materials attached to the diamond surface.

Keywords: NV Center; NMR Spectroscopy; Quantum Sensing; High Fields