Abstract: Nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) spectroscopy of bulk quantum materials have provided insight into phenomena such as quantum phase criticality, magnetism, and superconductivity. With the emergence of nanoscale 2-D materials with magnetic phenomena, inductively-detected NMR and NQR spectroscopy are not sensitive enough to detect the smaller number of spins in nanomaterials. The nitrogen-vacancy (NV) center in diamond has shown promise in bringing the analytic power of NMR and NQR spectroscopy to the nanoscale. However, Integration of the material with the NV sensor is a non-trivial process. The interaction between the target material and the sensor can result a reduction in the quality of the sensor through shorter spin lifetimes and lower photoluminescence. Also, techniques and methodology to get a specific material within 5 to 10 nm of the diamond surface.

In this talk, I will present recent results on the optimization of NV ensemble depth relative to the sensing target as well as ongoing work towards integrating metals and insulators to protect and even enhance the quality of NV sensors in magnetically interesting environments. I will also present ongoing and planned work for integration of nanoscale materials with diamond for quantum sensing.

Bio: Jacob Henshaw is a postdoctoral appointee at the Center for Integrated Nanotechnologies (CINT at Sandia National Laboratories) focusing on quantum sensing using NV centers on quantum materials and single photon emitters in diamond and other wide bandgap semiconductors. He received his PhD from the CUNY-Graduate Center in New York.