SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 23: Poster Magnetism I
MA 23.41: Poster
Dienstag, 28. März 2023, 17:00–19:00, P1
Planar scanning probes - A new platform for nanoscale magnetometry with NV centers and nearfield microscopy — •Paul Weinbrenner1, Stefan Ernst2, Patricia Quellmalz3, Christian Giese3, and Friedemann Reinhard1 — 1Universität Rostock, Rostock, Germany — 2ETH Zürich, Zürich, Switzerland — 3Fraunhofer Institut für Angewandte Festkörper Forschung, Freiburg, Germany
We present the application of a new scanning probe technique to magnetometry with nitrogen-vacancy (NV) centers in diamond. Instead of using sharp tips we use flat mesas (shallow pillars) with a lateral size of 50 micrometers and height of up to 5 micrometers. Due to their geometry these so-called planar scanning probes offer a unique advantage for nanoscale magnetometry and novel optical near-field sensors.
Despite their large lateral size, they can still be scanned at a standoff distance of several nanometers. To achieve this alignment, we use tilt and distance control with optical far- and near-field measurements.
We fabricate planar diamond probes and use NV center quantum sensors for magnetic field measurements. The lateral size of the planar probes enables highly parallel scanning probe magnetometry. Additionally, the fabrication is less complex compared to conventional diamond tips.
With this new approach to scanning probe measurements, we propose the emergence of new material systems as sensors for nanoscale imaging. These next generation sensors include plasmonic nanostructures, defects in 2D materials, and encapsulated, single molecules.