Proposed spin amplification for magnetic sensors employing crystal defects.
Proposed spin amplification for magnetic sensors employing crystal defects.
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DOI：
10.1103/physrevlett.107.207210
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发表时间：
2011-04
影响因子：
8.6
通讯作者：
M. Schaffry;E. Gauger;J. Morton;S. Benjamin
中科院分区：
文献类型：
--
作者：
M. Schaffry;E. Gauger;J. Morton;S. Benjamin
最近，人们对基于晶体缺陷，特别是金刚石中氮空位（NV）中心的磁场传感器的前景进行了一些理论和实验研究。这样的系统可能被整合到一个类似原子力显微镜的装置中，以便在单自旋水平上绘制表面的磁性。在这封信中，我们提出了一个增强传感器组成的NV中心读出和“放大器”自旋系统，直接感测本地磁场。我们的计算表明，这种混合结构具有检测磁矩的潜力，其灵敏度和空间分辨率远远超过简单的NV中心，实际上这可能是此类传感器的物理极限。
Recently there have been several theoretical and experimental studies of the prospects for magnetic field sensors based on crystal defects, especially nitrogen vacancy (NV) centers in diamond. Such systems could potentially be incorporated into an atomic force microscopy-like apparatus in order to map the magnetic properties of a surface at the single spin level. In this Letter we propose an augmented sensor consisting of an NV center for readout and an "amplifier" spin system that directly senses the local magnetic field. Our calculations show that this hybrid structure has the potential to detect magnetic moments with a sensitivity and spatial resolution far beyond that of a simple NV center, and indeed this may be the physical limit for sensors of this class.