Toward nuclear magnetic resonance spectroscopy above 1 Tesla with nitrogen-vacancy centers

The ability of nitrogen-vacancy (NV) centers in diamond to act as quantum sensors of magnetic fields over microscale distances has led to a wide range of applications, including the detection of nuclear magnetic resonance (NMR) signals from a liquid analyte. Applied magnetic fields B₀ > 1 T are needed to resolve 100-parts-per-billion chemical shifts in NMR spectroscopy, but such large fields present challenges for NV sensor spin manipulation. We describe progress in extending NV-NMR to B₀ > 1 T, including chip design and NV and nuclear control.