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Progress in research on atomic magnetometer of Wuhan Institute of Materials
[ Instrument Network Instrument Development ] Chip is the future development direction of atomic magnetometer design. Recently, researchers from the CPT frequency group of the Wuhan Institute of Physics and Mathematics of the Chinese Academy of Sciences have proposed a magnetometer probe design based on single-beam multi-color multi-polarized light and atomic action, which can be used to obtain high density of atomized gas chambers with chip size. Sensitivity susceptibility signal provides a feasible solution for chip-level high-precision atomic magnetometer design. The results of the study were published in the form of a quick report on Physical Review Applied.
At present, the more mature chip-level atomic magnetometer adopts the double resonance scheme, and its magnetic field sensitivity is not high, and it is on the order of 10pT/Hz1/2. The traditional high-precision atomic magnetometer is designed using the Faraday rotation principle. It is difficult to chip due to the need to use two beams of light and atoms that are perpendicular to each other.
The senior engineer Zhang Wei and others used the single-beam multi-color multi-polarized light and atomic action to achieve the same effect as the traditional Faraday optical effect atomic magnetometer program. The measured magnetic field sensitivity is 20fT/Hz1/2. Since the solution uses a single beam of light instead of the double beam and the atom, it can greatly reduce the probe volume and is easy to implement chip formation.
The work was funded by the Ministry of Science and Technology Key Research and Development Program and the Natural Science Foundation Youth Fund.