Donggyu Kim, Mohamed I. Ibrahim, Christopher Foy, Matthew E. Trusheim, Ruonan Han & Dirk R. Englund
DOI: 10.1038/ s41928-019‑0275‑5
The nitrogen–vacancy (NV) centre in diamond can be used as a solid-state quantum sensor with applications in magnetometry, electrometry, thermometry and chemical sensing. However, to deliver practical applications, existing NV-based sensing techniques, which are based on bulky and discrete instruments for spin control and detection, must be replaced by more compact designs. Here we show that NV-based quantum sensing can be integrated with complementary metal–oxide–semiconductor (CMOS) technology to create a compact and scalable platform. Using standard CMOS technology, we integrate the essential components for NV control and measurement—microwave generator, optical filter and photodetector—in a 200 μm × 200 μm footprint. With this platform we demonstrate quantum magnetometry with a sensitivity of 32.1 μT Hz−1/2 and simultaneous thermometry.