An ensemble nitrogen-vacancy color center-based device

Abstract

The invention provides a device based on an ensemble nitrogen-vacancy color center, comprising: a right angle prism; To polarize the ensemble nitrogen-vacancy color center with incident laser and collect the fluorescence signal of the ensemble nitrogen-vacancy color center; diamond, diamond is layered diamond, including opposite first and second surfaces, the first surface is fixed on The parabolic top of the dichroic parabolic condenser lens, the second surface contains the ensemble nitrogen-vacancy color center; the Lenz lens is attached to the second surface for converging the microwave magnetic field; the microwave coil is located above the Lenz lens and used for For applying a microwave magnetic field to an ensemble nitrogen-vacancy color center. The device based on the ensemble nitrogen-vacancy color center provided by the present invention, each part of which constitutes a relatively fixed whole, which can be used for miniaturized and portable high-sensitivity magnetometers and microscopic nuclear magnetic spectrometers.

Description

technical field [0001] The invention relates to the field of magnetic signal detection instruments, in particular to a device based on ensemble nitrogen-vacancy color centers. Background technique [0002] The ensemble nitrogen-vacancy defect centers (ensemble NV color centers) in diamond have been shown to have significant advantages in the detection of magnetic fields at the micro-nanoscale. Among them, the electron spin of the ensemble nitrogen-vacancy color center can be controlled by microwave, and initialized and read out by optical means. The ensemble nitrogen-vacancy color center has four different directions, which can measure the vector information of the external magnetic field. When detecting the NMR signal of the external sample, the sample can be close to the nitrogen-vacancy color center on the surface, so the nuclear magnetic resonance spectrometer made with the ensemble nitrogen-vacancy color center can detect extremely small sample volume. Moreover, diamo...

AI Technical Summary

Problems solved by technology

However, most of the traditional structures based on ensemble nitrogen-vacancy color centers use lenses to collect the fluorescence signals of nitrogen-vacancy color centers, and then pass through dichroic mirrors, focusing lenses and filters to reach photodetectors, which will take up a lot of space.

At the same time, because this kind of structure needs to fix the diamond on the structural support in advance, and fix the lens of the collection part (a small number of ensemble NV experimental structures use light guides, parabolic mirrors and other collection methods), photodiodes and other structures, so the actual The detection area will occupy a relatively large space, which not only restricts the robustness and integrity of the system, but also is not conducive to the operation of the system in a narrow environment

Taking nuclear magnetic resonance detection as an example, the magnet cavity that generates a uniform magnetic field is generally small. At this time, it is basically impossible to put in the traditional structure, and increasing the volume of the magnet cavity means a rapid increase in cost and weight of the magnet. This makes the ensemble-based Miniaturized NMR spectrometer of nitrogen-vacancy color center is very difficult

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