Speaker
Description
The Diamond NV centre consists of a substitutional nitrogen adjacent to a vacancy, and can exist in both charged (NV-) and uncharged states (NV0). The NV- are spin 1 centers which exhibit a magnetic moment due to the coupling of 2 individual electron magnetic moments. The magnetic field sensitivity of the spin-1 NV- centre results in a number of interesting physical effects when in the presence of various external fields (electric, magnetic, microwave, and light). Because of this, they have become a candidate for robust magnetic field sensors of several designs. Currently, one aspect on the forefront of NV center research is the development of compact optical readout magnetometers.
Diamond NV- magnetometers can exploit the Zeeman effect within the diamond matrix to produce discernible peaks whose separation is related to the strength of external magnetic fields $\gamma$ in the equation "2$\gamma$B"\cite{ejalonibu2019optimal,davis} in the presence of the NV center. Depending on the orientation of the field, this Zeeman splitting can produce a multitude of different peak separations based on the 4 possible orientations of the NV center in the crystal relative to the externally applied magnetic field. In addition the nuclear spin of the dominant 14N constituent of the nitrogen dopant atoms produces a hyperfine splitting. Presented here are Optically Detected Magnetic Resonance (ODMR) measurements of Zeeman and hyperfine splitting in a N-doped diamond crystal, with some discussion of their implications for magnetometry.
| Keyword-1 | magnetometer |
|---|---|
| Keyword-2 | zeeman |