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Measurements of magnetic properties on the atomic scale require a sensor with the intrinsic sensitivity for single spin detection, a size comparable to systems under investigation, and the capability for measurements without strongly influencing the spin properties of the studied systems. A prime example for such a quantum sensor is the nitrogen-vacancy (NV) center in diamond.
Using atomic force microscopy (AFM) techniques to position the sensor for magnetic resonance imaging measurements with subatomic precision with respect to the atoms or molecules of interest, highest spatial imaging resolution can be achieved. In combination with the inherent high energy resolution of Electron Spin Resonance and Nuclear Magnetic Resonance spectroscopy and imaging, fundamental properties and spin interactions of atoms and molecules can be investigated on the sub-Å and sub-neV scale.
NV magnetometry is applied to image single (bio)molecules at ultimate spatial resolution and to develop scalable quantum technologies for quantum information processing. Work done in collaboration with the Fellow Group of Prof. Wrachtrup .
NV-magnetometry confocal setup
Scanning NV-magnetometry setup