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An embedded nv based ‑ Magnetic Field Measuring Device of Color Center Diamond

A magnetic field measurement and diamond technology, which is applied in the direction of magnetic field measurement, magnetic field size/direction and other directions using magneto-optical equipment, can solve the problems of high and low temperature equipment maintenance costs, low spatial resolution, and increased instrument volume, etc., to achieve The effect of increasing the polarizability, reducing the volume of the probe, and simplifying the device

Active Publication Date: 2017-12-22
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 relatively high. High and low temperature equipment is essential, resulting in bulky instruments and low spatial resolution
Magnetometers based on spin-exchange relaxation free (SERF) need to heat the sensitive source, and the probe needs to be insulated during biomagnetic field detection and imaging, which limits its application. The device and the heat insulation device also increase the volume of the instrument

Method used

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  • An embedded nv based <sup>‑</sup> Magnetic Field Measuring Device of Color Center Diamond
  • An embedded nv based <sup>‑</sup> Magnetic Field Measuring Device of Color Center Diamond

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] An embedded NV based - The magnetic field measurement device of color center diamond includes a CCD image sensor 7 , a filter 9 , a dichroic mirror 10 , a fiber coupler 11 , a lens 13 , an adjustment frame 14 and a magnetic field measurement probe 12 . The magnetic field measurement probe 12 includes an embedded NV - Color center diamond 6 sensitive parts, phase-shift micro-nano fiber Bragg grating 5, microstrip antenna 4, static magnetic field coil 2, ordinary optical fiber 1.

[0030] The CCD image sensor 7 , the fiber coupler 11 and the adjustment frame 14 are integrated in the outer frame 8 of the magnetic field measuring device. The adjustment frame 14 fixes the optical fiber connected to the 532nm laser, and the 532nm laser emitted by the optical fiber is collimated by the lens 13 and reflected by the dichroic mirror 10, and can ...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/032
Inventor 房建成徐丽霞丁铭张晨张宁袁珩
Owner BEIHANG UNIV
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