High-resolution imaging of magnetic fields of banknote anti-counterfeiting strip using fiber diamond probe

作     者：赵旭彤 何飞越 薛雅文 马文豪 殷筱晗 夏圣开 曾明菁 杜关祥 Xu-Tong Zhao;Fei-Yue He;Ya-Wen Xue;Wen-Hao Ma;Xiao-Han Yin;Sheng-Kai Xia;Ming-Jing Zeng;Guan-Xiang Du

作者机构：College of Telecommunications and Information EngineeringNanjing University of Posts and TelecommunicationsNanjing 210003China College of ScienceNanjing University of Posts and TelecommunicationsNanjing 210003China School of Computer ScienceNanjing University of Posts and TelecommunicationsNanjing 210023China Bell Honors SchoolNanjing University of Posts and TelecommunicationsNanjing 210023China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2024年第33卷第4期

页      面：720-727页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080203[工学-机械设计及理论] 0802[工学-机械工程] 

基　　金：Project supported by the National Key Research and Development Program of China (Grant No.2021YFB2012600) the Shanghai Aerospace Science and Technology Innovation Fund,China (Grant No.SAST-2022-102) 

主　　题：banknote anti-counterfeiting strip nitrogen-vacancy(NV)centers magnetic field imaging numerical simulation 

摘      要：Counterfeiting of modern banknotes poses a significant challenge,prompting the use of various preventive *** such measure is the magnetic anti-counterfeiting ***,due to its inherent weak magnetic properties,visualizing its magnetic distribution has been a longstanding *** this work,we introduce an innovative method by using a fiber optic diamond probe,a highly sensitive quantum sensor designed specifically for detecting extremely weak magnetic *** employ this probe to achieve high-resolution imaging of the magnetic fields associated with the RMB 50denomination anti-counterfeiting ***,we conduct computer simulations by using COMSOL Multiphysics software to deduce the potential geometric characteristics and material composition of the magnetic region within the anti-counterfeiting *** findings and method presented in this study hold broader significance,extending the RMB 50 denomination to various denominations of the Chinese currency and other items that employ magnetic anti-counterfeiting *** advances have the potential to significantly improve and promote security measures in order to prevent the banknotes from being counterfeited.