A compact two-dimensional quantum magnetometer module based on the fixed-frequency optical detection of magnetic resonance using nitrogen vacancy centers

In this Letter, we propose an integrated two-dimensional magnetometer module based on nitrogen vacancy centers in diamond. The sensor has a constructed area of 7.12 cm(2) and exhibits a magnetic-field sensitivity of approximately 25.12 nT/Hz(1/2). By placing anti-microwave shield nets optimizing interference distance, the integrated scheme eliminates the effects of microwave interference on the amplifier. We propose the fixed-frequency optical detection of magnetic resonance, which is used to measure the relation between the magnetic field and the photoluminescence by scanning the magnetic field. Without relying on the lock-in technique, we developed an algorithm for analyzing the magnetic noise based on the PL noise analysis.

Automated summary

The Letter introduces an integrated two-dimensional magnetometer module based on nitrogen vacancy centers in diamond with high sensitivity. Through methods like anti-microwave shield nets and fixed-frequency optical detection of magnetic resonance, accurate measurement and analysis of magnetic fields are achieved.