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Nanoscale microwave magnetic field measurement method

A magnetic field measurement, nano-scale technology, applied in the direction of the size/direction of the magnetic field, can solve problems such as narrow bandwidth, and achieve the effect of high bandwidth and high precision

Active Publication Date: 2018-10-12
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

In order to accurately measure the microwave magnetic field strength at a certain point in space at the nanometer scale, we can calculate the amplitude of the microwave magnetic field to be measured by measuring the Rabi frequency of the electron based on the NV color center, but this method needs to meet the resonance condition, that is, it needs to be Know the frequency of the microwave to be tested
Therefore, this method can only measure the microwave amplitude of known frequency, and the bandwidth is narrow

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Embodiment Construction

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] An embodiment of the present invention provides a nanoscale microwave magnetic field measurement method, such as figure 1 As shown, it mainly includes the following steps:

[0023] Step S1, based on the BS translation effect, combined with the preset sequence for measuring the microwave magnetic field, measure that the microwave magnetic field is |0> state and |+1> state for the NV color center spin, and the NV color center spin is | The BS...

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Abstract

The invention discloses a nanoscale microwave magnetic field measurement method. The nanoscale microwave magnetic field measurement method can calculate the amplitude and the frequency of a microwavemagnetic field by measuring the BS translation amount and combining the set sequence, and the measurement range of the frequency is from 100 MHz to 5 GHz. Compared with a previous measurement method which uses coils, Rydberg atoms and superconducting coils, the nanoscale microwave magnetic field measurement method has nanoscale spatial resolution and higher precision, and can perform measurement at mild conditions, such as room temperature and atmosphere. Compared with a method of measuring amicrowave magnetic field by using Rabi oscillation based on the NV color center, the nanoscale microwave magnetic field measurement method does not require the condition of resonance, can measure the amplitude and the frequency of the microwave magnetic field at the same time, and has a very high bandwidth. The nanoscale microwave magnetic field measurement method has flexibility and universality, is suitable for the color center system, and can also be applied to other systems, such as cold atoms.Therefore, the nanoscale microwave magnetic field measurement method has many latent applications.

Description

technical field [0001] The invention relates to the technical field of microwave magnetic field measurement, in particular to a nanoscale microwave magnetic field measurement method. Background technique [0002] Electromagnetic waves can carry the information that people want to transmit. In modern communication, electromagnetic waves of various bands have been widely used, such as short-wave communication, radar detection, etc. However, it is still difficult to measure the high-frequency AC magnetic field accurately. With the advent of the 5G era, short-wave communication technology based on high-frequency electromagnetic waves has gradually developed, so a method that can accurately measure high-frequency AC magnetic fields is of great research significance. [0003] At present, there are mainly the following measurement schemes: [0004] a. Calculate the microwave magnetic field in free space by measuring the induced current in the coil. When the microwave magnetic fie...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/02
CPCG01R33/02
Inventor 杜江峰张一幸王鹏飞李瑞王成杰秦熙石发展王亚
Owner UNIV OF SCI & TECH OF CHINA
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