摘要
磁测量技术在诸如地磁测绘与导航、无损检测等领域中都有着重要作用。近些年,量子精密测量技术由于其高灵敏度的优点,已逐渐成为磁测量领域的主流研究方向。与经典的测量方法相比,量子精密测量利用量子系统对环境的敏感性实现对物理量的精确测量,在灵敏度等指标上具有突出优势。金刚石氮-空位色心是金刚石中的一种点缺陷,其对磁场敏感并且能够在室温大气环境下通过光学方法进行初始化和读出。因此,该体系目前已被广泛地应用于磁测量领域。自2008年被提出以来,基于金刚石氮-空位色心体系的磁力计在灵敏度指标和应用潜力等方面的研究都取得了众多进展。目前,金刚石磁力计对低频和高频磁场都能够实现亚皮特斯拉(sub-pT)量级的磁测量灵敏度。同时,金刚石晶格结构的稳定性使得氮-空位色心系综在矢量磁场测量技术方面具有高正交度等方面的优势,这也将推动地磁导航等领域的进步。在应用研究方面,该体系已在生物磁信号测量、涡流磁成像、古地磁学中的矿石检测等诸多领域崭露头角。未来,金刚石磁力计将逐渐在优化灵敏度指标的同时兼顾集成化研究,为磁测量应用提供新方法与新工具。
Magnetometry plays an irreplaceable part in many fields such as non-destructive testing,magnetic surveying,and navigation.In recent years,quantum sensing has gradually become the mainstream research direction in the field of magnetometry due to its high sensitivity.Compared to traditional methods,quantum sensing uses the sensitivity of quantum system to the environment to achieve accurate measurement of physical quantities,which has outstanding advantages in sensitivity and other indicators.Nitrogen-vacancy(NV)centers in diamond is a kind of point defect in diamond,which is sensitive to the magnetic field.NV centers can be initialized and read out by laser at room temperature.Thus,it is widely used in magnetometry.Since it is put forward in 2008,the magnetometer based on NV centers has made a lot of progress in sensitivity and application potential.For example,magnetometers based on NV centers have the sensitivity of up to subpicotesla(sub-pT)magnitude in both low-frequency and high-frequency domains.Besides,the stability of diamond lattice makes NV centers ensemble have the advantages of high orthogonality in vector magnetometry,which could make contributions to magnetic navigation.Nowadays,NV centers are widely applied in many fields such as biomagnetism signal measurement,imaging of eddy current and ore detection in paleomagnetism.In the future,magnetometers based on NV centers is going to develop miniature devices while improving performances,which can offer new solutions to the community.
作者
蓝子桁
谢一进
荣星
LAN Zi-heng;XIE Yi-jin;RONG Xing(School of Physical Sciences,University of Science and Technology of China,Hefei 230026)
出处
《导航与控制》
2022年第5期122-138,共17页
Navigation and Control
基金
国家自然科学基金(编号:12150010)。
关键词
金刚石氮-空位色心
量子精密测量
磁测量
光探测磁共振
nitrogen-vacancy centers(NV)in diamond
quantum sensing
magnetometry
optical detected magnetic resonance(ODMR)
