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A Scanning Magnetometer of Nitrogen-Vacancy Color Center Diamond

A diamond and nitrogen vacancy technology is applied in the field of scanning magnetometers, which can solve the problems of limited application scope and low measurement sensitivity, and achieve the effect of broadening the application scope, improving measurement sensitivity and reasonable structure.

Active Publication Date: 2018-10-30
ZHONGBEI UNIV
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Problems solved by technology

[0003] In order to solve the problems of low measurement sensitivity and limited application range of existing weak magnetic field information measurement tools, the present invention provides a scanning magnetometer for nitrogen vacancy color center diamond

Method used

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  • A Scanning Magnetometer of Nitrogen-Vacancy Color Center Diamond

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Embodiment Construction

[0014] A scanning magnetometer for nitrogen vacancy color center diamond, including an atomic force microscope system and an optical detection magnetic information system;

[0015] The atomic force microscope system includes an ultra-high vacuum cavity, a scanning cylinder 1, a nitrogen vacancy color center diamond probe 2, a 670nm wavelength laser 3, a four-quadrant photodiode detector 4, a phase-locked loop 5, an automatic gain control loop 6, a pressure Electric ceramic 7, 50Ω resistor 8, feedback control loop 9, lock-in amplifier 10, carrier 11, surface topography information output port 12, magnetic information output port 13;

[0016] The optical detection magnetic information system includes a copper wire 14 with a diameter of 20 μm, a microwave generator 15, a microwave switch 16, a radio frequency generator 17, a radio frequency switch 18, an objective lens 19, a first reflector 20, a 532nm wavelength laser 21, a second reflector mirror 22, avalanche photodiode 23, ma...

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Abstract

The invention relates to a weak magnetic field measurement technique, in particular, a novel nitrogen-vacancy center diamond scanning magnetometer. With the novel nitrogen-vacancy center diamond scanning magnetometer adopted, the problems of low sensitivity and limited application range of existing weak magnetic field information measuring tools can be solved. The novel nitrogen-vacancy center diamond scanning magnetometer of the nitrogen-vacancy center diamond includes an atomic force microscope system and an optical detection magnetic information system; and the atomic force microscope system includes an ultra-high vacuum chamber, a scanning tube, a nitrogen-vacancy center diamond probe, a 670nm-wavelength laser, a four-quadrant photodiode detector, a phase-locked loop, an automatic gain control loop, piezoelectric ceramic, a 50-ohm resistor, a feedback control loop, a lock-in amplifier, a carrier, a surface topography information output port and a magnetic information output port. The novel nitrogen-vacancy center diamond scanning magnetometer of the invention is suitable for weak magnetic field information measurement.

Description

technical field [0001] The invention relates to weak magnetic field information measurement technology, in particular to a scanning magnetometer of nitrogen vacancy color center diamond. Background technique [0002] The measurement of weak magnetic field information plays an important role in the fields of national economy, science and technology, military affairs and medical treatment. Under the current technical conditions, the tools that can realize the measurement of weak magnetic field information mainly include: scanning magnetic field microscope based on single spin, optical magnetometer using gas phase basic atoms, spin polarized scanning tunneling microscope (SP-STM) , Magnetic Exchange Force Microscopy (MExFM). Practice has shown that the above-mentioned weak magnetic field information measurement tools have the following problems due to their own structure limitations: First, the scanning magnetic field microscope based on a single spin has a strong coupling eff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01Q60/24
Inventor 刘俊马宗敏石云波唐军张晓明李艳君薛晨阳曲章谢艳娜张欢
Owner ZHONGBEI UNIV
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