Nanoscale magnetic sensing using spin qubits in diamond
Nanoscale magnetic sensing using spin qubits in diamond
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DOI：
10.1117/12.813802
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发表时间：
2009-02
期刊：
影响因子：
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通讯作者：
J. Maze;P. Cappellaro;L. Childress;M. Dutt;J. Hodges;J. S. Hodges;Sungkun Hong;Liang Jiang
中科院分区：
文献类型：
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作者：
J. Maze;P. Cappellaro;L. Childress;M. Dutt;J. Hodges;J. S. Hodges;Sungkun Hong;Liang Jiang
以纳米级空间分辨率感测纳米磁场的能力是与物理和生物科学相关的突出技术挑战。例如，这种弱局部场的检测将使得能够感测来自复杂生物分子中的单个电子或核自旋的磁共振信号，以及读出编码在电子或核自旋存储器中的经典或量子比特的信息。在这里，我们提出了一种新的方法，纳米磁传感的基础上相干控制的一个单独的电子自旋中的氮空位（NV）中心的金刚石。在室温下，使用超纯金刚石样品，我们实现了100秒的信号平均后，以kHz频率振荡的3纳米特斯拉磁场的散粒噪声限制检测。此外，我们实验证明纳米级的分辨率，使用30纳米直径的金刚石纳米晶，我们实现了0.5微特斯拉/赫兹1/2的灵敏度。
The ability to sense nanotelsa magnetic fields with nanoscale spatial resolution is an outstanding technical challenge relevant to the physical and biological sciences. For example, detection of such weak localized fields will enable sensing of magnetic resonance signals from individual electron or nuclear spins in complex biological molecules and the readout of classical or quantum bits of information encoded in an electron or nuclear spin memory. Here we present a novel approach to nanoscale magnetic sensing based on coherent control of an individual electronic spin contained in the Nitrogen-Vacancy (NV) center in diamond. At room temperature, using an ultra-pure diamond sample, we achieve shot-noise-limited detection of 3 nanotesla magnetic fields oscillating at kHz frequencies after 100 seconds of signal averaging. Furthermore, we experimentally demonstrate nanoscale resolution using a diamond nanocrystal of 30 nm diameter for which we achieve a sensitivity of 0.5 microtesla / Hz1/2.