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Extreme undersampling reconstruction method for NV color center optical detection magnetic resonance curve

A technology of optical detection and magnetic resonance, which is applied in the field of signal processing, can solve the problems of high computational complexity and high time cost of ODMR curves, and achieve high computational complexity, reduce time-consuming and data volume to be processed, and solve time costly effect

Active Publication Date: 2021-12-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] In view of the above-mentioned problems, in order to reduce the time cost and high computational complexity of the existing optical detection magnetic resonance magnetic resonance method to obtain the ODMR curve, the present invention provides an extreme NV color center optical detection magnetic resonance curve The undersampling reconstruction method, based on the curve fitting technology, uses the Lorenz function form to fit the ODMR curve

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  • Extreme undersampling reconstruction method for NV color center optical detection magnetic resonance curve
  • Extreme undersampling reconstruction method for NV color center optical detection magnetic resonance curve
  • Extreme undersampling reconstruction method for NV color center optical detection magnetic resonance curve

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[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0039] Each resonance peak of the ODMR curve can be fitted with a Lorentz function, this implementation is for x 1 (f)~x 13 (f) Give a full description.

[0040] figure 2 x in 1 (f) is the used resonance peak of embodiment, x 2 (f) is a verification example, the abscissa is the microwave frequency f, unit GHz; the ordinate is the fluorescence intensity; image 3 (a) and (b) are the formant sources used for subsequent verification of the feasibility of this invention, including x 3 (f)~x 13 (f), the abscissa is the microwave frequency f, unit MHz; the ordinate is the fluorescence intensity.

[0041] In the computer MATLAB environment, change the parameters in (1) to get different noise signals, according to x 1 The shape of (f), after adjustment, the noise signal n(f)~N(0, 1.5×10 -6 ).

[0042]In this embodiment, the false alarm prob...

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Abstract

The invention belongs to the field of signal processing, and particularly relates to an extreme undersampling reconstruction method for an NV color center optical detection magnetic resonance curve. The method comprises the following steps of: firstly, determining a threshold value from theoretical derivation by a method of setting the threshold value, screening data, and reducing the interference of noise on the acquisition of an ODMR curve; and then solving parameters in the Lorentz fitting function under the set N and threshold conditions, solving a required frequency value, and finally obtaining a fitting curve of the formant. According to the extreme undersampling fitting method provided by the invention, fitting of an ODMR curve is realized by using extremely few sampling data, a fitting curve of a formant can be obtained only by exciting a plurality of microwave frequencies, and frequency sweeping of the whole frequency band is not needed; the problems of high time cost and high calculation complexity for obtaining the ODMR curve by the existing optical detection magnetic resonance magnetic measurement method are effectively solved.

Description

technical field [0001] The invention belongs to the field of signal processing, and in particular relates to an extremely under-sampled reconstruction method of an NV color center optical detection magnetic resonance curve. Background technique [0002] In recent years, the use of quantum systems such as NV color centers to realize high-precision weak magnetic field detection technology at the micro-nano scale has been widely developed, and the main method of using NV color center measurement is optical detection magnetic resonance (ODMR) magnetometry. . Due to the special energy level structure and optical properties of the electron spin of the NV color center, when a microwave field acts on the NV color center, the NV color center will absorb microwave energy and cause a transition between the ground state triplet energy levels, resulting in Changes in fluorescence signal intensity of NV color centers. When we detect the fluorescence emitted by NV color centers irradiate...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G01R33/24G06F17/15
CPCG01R33/24G06F17/15G06F2218/04Y02A90/30
Inventor 罗钐朱震晖陈鹏张琦翔
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA