Three-axis solid-state atomic magnetic sensor based on diamond NV color center and magnetic field detecting method

Abstract

The method of the invention includes that a spin triplet state electronic ground state based on a diamond NV color center uses the diamond NV color center as a sensitive component under different magnetic field conditions, and the NV color center is excited by the laser 532 nm; the NV color center emits fluorescence through external microwave, and further, an ODMR spectrum is obtained. Three pairsof distinct Zeeman split peaks can be extracted from the spectrum, and the resonance frequency difference between each pair of peaks is measured. The three different frequency differences come from three different NV directions, and the magnitudes of the three frequency differences are proportional to the magnetic field strength along projections of three symmetry axes in the NV color center, andthe three orientations is sufficient to extract three components of the magnetic field, which is the total field strength in this state. The measured weak magnetic field of the magnetized permalloy is obtained by subtracting the known magnetic field from the total field strength. Furthermore, the detection of the weak magnetic field of the local spin triplet state electronic ground state based onthe diamond NV color center is realized.

Description

Technical field [0001] The invention relates to the field of quantum sensors, in particular to a weak magnetic field detection system and method based on the ground state of a local spin triplet electron of a diamond NV color center. Background technique [0002] Weak magnetic detection, such as the accurate measurement of the geomagnetic field, is of great significance in aerospace, aviation, navigation and long-range precision guidance. At present, super-sensitive magnetometers for measuring weak magnetic fields include superconducting quantum interferometers, proton magnetometers, Hall probe scanning microscopes, magnetic force microscopes, etc., but they need to be performed under specific conditions (such as low temperature and high vacuum, etc.), and cost Higher. [0003] Studies have found that the retina of birds, the pineal gland of salamanders, and the abdomen of bees contain magnetic induction sources. The "trigeminal nerve hypothesis" and the "radical pair mechanism (...

AI Technical Summary

Problems solved by technology

There have been studies using the NV color center system for the weak magnetic measurement of single nuclear spins in protein molecules, but there are few reports on the precise measurement of static weak magnetic fields

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