Quantum diamond precision magnetic measurement system based on single spin

Abstract

The invention discloses a quantum diamond precision magnetic measurement system based on single spin, and the system comprises an optical confocal module which is used for generating laser with a preset wavelength, irradiating the laser on a probe, integrating a nitrogen-vacancy center in the probe, and collecting and filtering fluorescence emitted by an NV color center in the probe due to energy level transition; the temperature control module is used for maintaining the temperature environment of the system; the microwave module is used for generating microwaves, accurately radiating the microwaves to the sample and reducing the microwaves radiated to the microwave amplifier so as to reduce the damage to the microwave amplifier; and the scanning probe module is used for realizing alignment of a probe and an objective lens and realizing barrier type scanning imaging of a sample. The system realizes room-temperature atmosphere, multi-mode, quantitative microscopic magnetic property and lossless imaging, and greatly meets the experimental requirements of multiple important fields such as topological magnetic structure, superconducting magnetic imaging and life science in-situ imaging.

Description

technical field [0001] The invention relates to the technical field of measurement, in particular to a single-spin-based quantum diamond precision magnetic measurement system. Background technique [0002] The study of magnetic properties at the micro- and nano-scale has broad application prospects in important fields such as physical science, materials science, and life science. and other methods. [0003] However, the magnetic detection methods in the related art often have the following problems: [0004] (1) It is difficult to achieve non-destructive testing. Specifically, the main difficulty in studying magnetic materials with TEM is that the sample is usually immersed in the high magnetic field of the objective lens (typically 0.6-1.2 T), which is sufficient to completely eliminate or severely distort most magnetic domain structures of interest. In the magnetic force microscope, the distance between the needle tip and the sample is generally maintained at tens of na...

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Problems solved by technology

[0005] (2) Strict environmental requirements

Specifically, the existing magnetic imaging technology has strict requirements on the imaging environment of the sample. For example, the electron beam in the transmission electron microscope needs to be accelerated in a vacuum environment to maintain collimation, so it basically works in a low temperature and high vacuum environment. , which makes it difficult to detect the true properties of biological materials or other special materials;

[0006] (3) Complicated sample preparation

How the processed sample is removed from the substrate also requires a complex process;

[0007] (4) It is difficult to realize quantitative magnetic information detection

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