Novel three-dimensional scanning measurement system and method for spin concentration

Abstract

A novel three-dimensional scanning measurement system for spin concentration mainly comprises a laser focus adjustment system, a fluorescence acquisition system and a diamond displacement table. Fixed-point measurement and focus depth adjustment on meshed diamond are realized by laser through cooperation of a confocal system and the laser focus adjustment system, wherein a focus piezoelectric group is used for realizing focus depth adjustment of the confocal system and mainly comprises a torsional piezoelectric group and a telescopic piezoelectric group in a manner of interpenetrating at intervals, and the focus depth adjustment of a convex lens is realized through motion matching; fluorescence generated by excitation of the diamond is collected by PD and transmitted into a computer by a data acquisition card; the diamond is fixed on a diamond displacement table, and the diamond displacement table moves in a nm-scale plane. The diamond is divided into m layers by the measurement system, each layer is divided into n*n matrix grids, the laser is focused in the n*n matrix grids for NV excitation and fluorescence collection, concentration of each grid is calculated, and three-dimensional concentration scanning is realized.

Description

technical field [0001] The invention belongs to the field of quantum precision measurement, in particular to diamond NV - The method for measuring spin concentration is specifically a novel three-dimensional scanning spin concentration measuring system and method. Background technique [0002] With the continuous advancement of science and technology, precision magnetic measurement has become a research hotspot at this stage. In order to obtain magnetic information with higher sensitivity, we need to study and compare various tools that can realize magnetic information measurement, so as to obtain optimized precision measurement tools and apply them in various research fields. At this stage, in order to obtain high-sensitivity magnetic information detection, researchers have shifted their focus to the research and control of magnetic information detection using electron spin. At present, in view of the high environmental requirements and low system stability in various typ...

AI Technical Summary

Problems solved by technology

At present, in view of the high environmental requirements and low system stability in various types of precision magnetic information measurement systems, basic research on magnetic information measurement using diamond NV color center electron spins has been carried out, which is expected to provide a basis for future NV color-based Heart electron spins lay the groundwork for applications of high-sensitivity atomic magnetometers

At present, the basis for the generation of diamond NV color center electron spins is to prepare diamonds containing NV color centers. The current research on the electron spins of NV color centers mainly includes single NV color center electron spins and cluster NV color centers. Fluorescence acquisition and measurement of NV color centers, but the measurement and characterization of NV concentration in diamonds with clustered NV color centers is still a blank, and it is an area that urgently needs to be researched and proposed a reliable measurement method, which will be beneficial to the realization of The high-sensitivity magnetometer based on NV color center and the research based on NV color center have far-reaching influence and great significance

[0003] At present, the concentration collection of diamond NV color centers is mostly excited by 532nm laser, and the fluorescence generated by the electronic transition is collected and observed by confocal microscopy imaging, and the overall NV color center concentration is estimated in turn, but It is impossible to scan the diamond three-dimensionally to obtain the NV fluorescence intensity of each surface or even each point of each layer, and calculate the three-dimensional NV concentration matrix based on the fluorescence intensity corresponding to a single NV

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