Scanning detection system based on diamond NV color center

Abstract

The invention discloses a scanning detection system based on a diamond NV color center. A diamond NV color center is fixed at the end part of one end of the multimode optical fiber to form a probe structure capable of realizing laser pumping and fluorescence collection. A dichroscope is arranged at the other end of the multimode optical fiber. A laser beam of the light source can enter the multimode optical fiber after being reflected by the dichroscope. Then, the multimode optical fiber is fixed on a probe displacement table for moving the multimode optical fiber. A laser beam of the light source is reflected by the dichroscope and then enters the multimode optical fiber. Laser is pumped at one end of the multimode optical fiber to excite the NV color center of the nano-diamond. Fluorescence is collected by means of the multimode fiber taper. Feedback fluorescence of the multimode optical fiber is received through the single-photon detector. Physical field ultrahigh spatial resolutiondetection based on the diamond NV color center is achieved, the nano-diamond NV color center serves as a sensitive element and is bonded to the head of the optical fiber probe, laser excitation and fluorescence signal collection are achieved by means of the optical fiber probe, the structure is simple, and measurement is convenient.

Description

technical field [0001] The invention belongs to the field of quantum sensing research, in particular to a scanning detection system based on diamond NV color centers. Background technique [0002] NV color center (nitrogen vacancy center) is a kind of luminous point defect in diamond. A nitrogen atom replaces a carbon atom in diamond, and there is a hole in the adjacent position. Such a point defect is called an NV color center. The quantum sensing technology based on diamond NV color center is a multi-disciplinary and multi-category ultra-high-precision technology based on quantum physics, quantum materials, quantum optics and micro-nano technology. It is also a new type with the most potential and the widest research scope. Sensors are one of the commanding heights of science and technology that countries are vying to occupy. The ultra-high sensitivity and ultra-high spatial resolution measurement technology based on nano-diamond NV color centers can effectively promote ...

AI Technical Summary

Problems solved by technology

At the same time, in the field of new materials, this technology can also be used to study the physical properties of new materials such as graphene and ferromagnetism. However, the existing scanning detection system uses an objective lens to realize the excitation of color centers and fluorescence collection, which has low fluorescence collection efficiency and low noise. Big, not conducive to system miniaturization integration and other issues

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