基于金刚石 NV 色心的电流传感器仿真

赵龙 $ ^{1} $，王鑫 $ ^{1} $，孙峰 $ ^{2} $，汪玉 $ ^{1} $，陈明 $ ^{2} $，许克标 $ ^{2} $

(1. 国网安徽省电力有限公司电力科学研究院，安徽合肥 230601；2. 国仪量子（合肥）技术有限公司，安徽合肥 230088)

摘要

NV 色心是金刚石中的一种点缺陷, 可以用于高精度磁场测量。文章探讨将 NV 系综作为磁传感器来测量电流的可行性, 并对电流强度、NV 色心荧光强度与偏共振的关系进行建模仿真, 分析传感器放置距离、激光、微波功率、金刚石 NV 色心浓度等对传感器性能的影响, 从而为金刚石 NV 色心电流传感器的设计与研制奠定了理论基础。

关键词

量子精密测量；磁传感；电流传感；电子自旋共振

中图分类号：TM936.1

文献标志码：A

文章编号：1003-5060（2023）06-0760-07

Simulation of current transformer based on NV center in diamond

ZHAO Long $ ^{1} $, WANG Xin $ ^{1} $, SUN Feng $ ^{2} $, WANG Yu $ ^{1} $, CHEN Ming $ ^{2} $, XU Kebiao $ ^{2} $

(1. Electric Power Research Institute, State Grid Anhui Electric Power Co., Ltd., Hefei 230601, China; 2. Chinainstru & Quantumtech (Hefei) Co., Ltd., Hefei 230088, China)

Abstract

The nitrogen-vacancy(NV) center is a kind of quantum defect in diamond which can be used in high precision magnetic measurement. This paper studies the potential of current sensing with NV ensemble as current transformer, and carries out the modeling and simulation on the relationship between the current intensity and fluorescence intensity of NV center and the off-resonance. The effects of transformer location, laser, microwave power and NV center concentration on transformer performance are analyzed. The study can lay a theoretical foundation for the design and development of diamond NV center magnetometer as current transformer.

Keywords

quantum precision measurement; magnetic sensing; current sensing; electron spin resonance

收稿日期：2020-04-14

修回日期：2020-06-22

基金项目：国家电网有限公司科技资助项目（52120519009）