A system and method for measuring the resonance frequency of a near-field microwave resonator

Abstract

The invention relates to a system and method for measuring resonant frequency of near-field microwave resonator, which utilizes electron spin resonance and diamond nitrogen vacancy defect (NV color center) to pull the oscillation frequency and the intensity of the microwave to place the diamond in a static magnetic field. In the process, the microwave pulse frequency and the magnetic field intensity are changed to perform photodetection magnetic resonance and rabbi oscillation measurement, and a series of rabbi oscillation frequencies are obtained, from which the resonator resonance frequencyis extracted. The measuring system comprises an optical module, a microwave module, a magnetic field device, a diamond and a control device, wherein the diamond is embedded with a NV color core; theoptical module can generate and guide light to the diamond, and simultaneously detect the fluorescent signal emitted by the diamond. The microwave module can generate a microwave control field and load it onto the diamond. The magnetic field device can generate a static magnetic field. The invention can measure the resonant frequency and the effective magnetic field strength of the microwave resonator practically and accurately, has high precision, and can be used under near-field conditions.

Description

technical field [0001] The invention relates to the technical field of quantum sensors, in particular to a diamond-based NV - The color center near-field microwave resonator resonance frequency measurement system and method have important significance and value for applications related to electron spin resonance (ESR) in various fields, especially in the fields of medical detection, chemical detection and magnetic detection. Background technique [0002] Resonance phenomena are widely used in many disciplines, especially in the field of high-practicability, high-efficiency and high-precision sensor research. At the same time, electron spin resonance (ESR) based on quantum effects has significantly improved the measurement sensitivity in various fields. Measurements using ESR require the manipulation of the electron's spin state using microwaves generated by a microwave resonator, which is highly dependent on the precision of the resonant frequency of the microwave resonator...

AI Technical Summary

Problems solved by technology

[0004] For the measurement of the resonant frequency of near-field microwave resonators, there is no systematic measurement method at home and abroad at present, and the existing mature resonator resonant frequency measurement methods, such as the use of vector network analyzers, have complex measurement systems and require external equipment, which cannot be maintained at this time. Simultaneous measurement of field near-field device integrity and conformance to operating conditions

If the resonant frequency of the resonator is measured separately, there will be a deviation from the resonant frequency when the resonator actually works

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