Embedded NV-center diamond based magnetic field metering device

Abstract

The invention relates to an embedded NV-center diamond based magnetic field metering device. A nanometer diamond particle with a negatively charged nitrogen-vacancy(NV)-center is adopted as a sensitive element. Phase-shift micro-nano FBG (Fiber Bragg Grating) is adopted to be a sample cavity. Laser and microwave are utilized for controlling NV-center electronic energy level and magnetic field metering is realized through detecting the fluorescent intensity of the NV-center. The device provided by the invention has comparatively high spatial resolution and comparatively good stability and also has advantages of being small in size, low in cost and being compatible to room temperature operation. The device can perform metering on the surface of a to-be-meter object or in micro holes or gaps and is a magnetic field metering device based on solid atom spin. The device can be used for satisfying requirements for weak magnetic field metering with low cost and high spatial resolution in different field in the future.

Description

technical field [0001] The invention relates to the technical field of magnetic field measurement, in particular to a - The color center diamond magnetic measuring device can be used for the measurement of high spatial resolution and weak magnetic fields, and has important application value in the fields of basic physics, chemical materials, biomedicine, and industrial testing. Background technique [0002] With the continuous advancement of society and science and technology, the demand for weak magnetic field measurement continues to increase. The discovery of some new physical effects and the breakthrough of new technology have greatly improved the performance of the magnetic field measurement device. Magnetic field weakening measurement technology has penetrated into basic physics, biomedicine, industrial testing, military defense and other fields, and has broad application prospects in the Internet of Things and smart grids. [0003] Superconducting quantum interferen...

AI Technical Summary

Problems solved by technology

[0003] Superconducting quantum interference device (SQUID) is currently the most sensitive magnetic field measurement device in engineering applications, but it needs liquid nitrogen or liquid helium to cool down and maintain a temperature of 4.2K or 77K when the instrument is working, and the maintenance cost is high and the temperature is low. Equipment is essential, resulting in bulky instruments and poor spatial resolution

Magnetometers based on spin-exchange relaxation (spin-exchangerelaxationfree, SERF) need to heat the sensitive source, and the probe needs to be insulated during biomagnetic field detection and imaging, which limits its application. At the same time, the heating device, Thermal insulation also increases the size of the instrument

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