  The nitrogen vacancy (NV) center in diamond has emerged as a leading
solid-state quantum sensor for applications including magnetometry,
electrometry, thermometry, and chemical sensing. However, an outstanding
challenge for practical applications is that existing NV-based sensing
techniques require bulky and discrete instruments for spin control and
detection. Here, we address this challenge by integrating NV based quantum
sensing with complementary metal-oxide-semiconductor (CMOS) technology. Through
tailored CMOS-integrated microwave generation and photodetection, this work
dramatically reduces the instrumentation footprint for quantum magnetometry and
thermometry. This hybrid diamond-CMOS integration enables an ultra-compact and
scalable platform for quantum sensing and quantum information processing.
