首页|High-resolution imaging of magnetic fields of banknote anti-counterfeiting strip using fiber diamond probe
High-resolution imaging of magnetic fields of banknote anti-counterfeiting strip using fiber diamond probe
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Counterfeiting of modern banknotes poses a significant challenge,prompting the use of various preventive measures.One such measure is the magnetic anti-counterfeiting strip.However,due to its inherent weak magnetic properties,visual-izing its magnetic distribution has been a longstanding challenge.In 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 mag-netic fields.We employ this probe to achieve high-resolution imaging of the magnetic fields associated with the RMB 50 denomination anti-counterfeiting strip.Additionally,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 strip.The 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 strips.These advances have the potential to significantly improve and promote security measures in order to prevent the banknotes from being counterfeited.
banknote anti-counterfeiting stripnitrogen-vacancy(NV)centersmagnetic field imagingnu-merical simulation
赵旭彤、何飞越、薛雅文、马文豪、殷筱晗、夏圣开、曾明菁、杜关祥
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College of Telecommunications and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China
College of Science,Nanjing University of Posts and Telecommunications,Nanjing 210003,China
School of Computer Science,Nanjing University of Posts and Telecommunications,Nanjing 210023,China
Bell Honors School,Nanjing University of Posts and Telecommunications,Nanjing 210023,China
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国家重点研发计划Shanghai Aerospace Science and Technology Innovation Fund,China
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