Laser-fabricated quantum photonic sensors in diamond - Shane Eaton

The negatively charged nitrogen-vacancy (NV) center is a defect in diamond which is capable of high sensitivity, high resolution sensing of electromagnetic fields. An integrated optics platform in diamond is beneficial for quantum-enabled sensing, due to increased stability, enhanced optical interaction with NVs and novel 3D configurations. We characterize the properties of NVs and photonics formed by focused femtosecond laser pulses in synthetic high pressure high temperature and chemical vapor deposition diamond. We present quantum sensors based on integrated photonics in diamond, with magnetic field sensitivities on the order of nT Hz^-0.5.