PREFERRED. Englund's Quantum Photonics Laboratory builds solid-state quantum technologies spanning diamond NV-center ensembles, integrated photonic circuits, and single-photon detectors, including a CMOS-integrated NV-ensemble quantum sensor for vector magnetometry and 4-pi steradian field sensing, and cavity-QED schemes for nuclear-spin readout aimed at nanoscale/inertial sensing. This continues the trajectory of NV ensemble quantum sensing (DEER, chip-scale NMR, T1 relaxometry) toward pT/sqrt(Hz)-class, chip-integrated magnetometers, alongside quantum networking and photonic quantum computing work.