Mohamed I. IBRAHIM - Cambridge MA, US Christopher FOY - Cambridge MA, US Donggyu KIM - Cambridge MA, US Dirk ENGLUND - Brookline MA, US Ruonan HAN - Cambridge MA, US
International Classification:
G01R 33/032 G06N 10/00 G01R 33/00
Abstract:
The Zeeman shift of electronic spins in nitrogen-vacancy (NV) centers in diamond has been exploited in lab-scale instruments for ultra-high-resolution, vector-based magnetic sensing. A quantum magnetometer in CMOS utilizing a diamond-nanocrystal layer with NVs or NV-doped bulk diamond on a chip-integrated system provides vector-based magnetic sensing in a compact package. The system performs two functions for the quantum magnetometry: (1) strong generation and efficient delivery of microwave for quantum-state control and (2) optical filtering/detection of spin-dependent fluorescence for quantum-state readout. The microwave delivery can be accomplished with a loop inductor or array of wires integrated into the chip below the nanodiamond layer or diamond. And the wire array can also suppress excitation light using a combination of plasmonic and (optionally) Talbot effects.