NV Spin Sensor
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, on which our unique low temperature magnetometer for sensing magnetic fields on the atomic scale is based. With the NV center, single spins can be read out and controlled by pure optical access of the NV center’s quantum states.
With the single NV center located on the apex of a fabricated diamond AFM cantilever, the quantum sensor can be positioned with highest accuracy and stability. In combination with the enhanced field strength (~1T), ESR and NMR experiments on single molecules and atoms are becoming possible, to determine the magnetic properties and spin interactions with highest energy and spatial resolution. The NV microscope has been developed in collaboration with the Fellow Group of Prof. Wrachtrup.