High resolution AC magnetometry NMR spectrometer development using diamond nitrogen-vacancy centers

Nitrogen-vacancy (NV) quantum defects in diamond are sensitive detectors of magnetic fields. Due to their atomic size and optical readout capability, they have been used for magnetic resonance spectroscopy of exceptionally low volume samples on diamond surfaces. Here we present our approaches to develop and construct a simple, low-cost NV-dectected NMR spectrometer. The underlying theory and preliminary experimental data will be presented.