Single shot readout of NV detectors for chemically relevant single-molecule magnetic resonance.

用于化学相关单分子磁共振的 NV 探测器的单次读数。

• 批准号: 276450883
• 负责人: Professor Dr. Friedemann Reinhard
• 金额: --
• 依托单位: Institut für Physik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/276450883?language=en
• 关键词: Single; shot; readout; NV; detectors

The project aims at to gain an order of magnitude in sensitivity and two orders of magnitude in spectral resolution over the state of the art in nanoscale NMR and EPR experiments detected by NV centers in diamond and to exploit this progress for the detection of chemically relevant spectral features in nano-NMR experiments. This improvement shall be enabled by combining two recently developed techniques for more efficient readout of the NV center electron spin into nanoscale magnetic resonance experiments: single shot spin readout of the NV center by nuclear quantum memories [1] and efficient fluorescence readout by spin-charge conversion [2]. Single shot readout by nuclear quantum memories is a technique to overcome the low detection efficiency of fluorescence readout of the NV center electron spin. It reduces acquisition times by two orders of magnitude or, equivalently, boosts sensitivity by one order of magnitude by storage and repetitive readout of a measurement result in a quantum memory, formed e.g. by the NV center nitrogen nuclear spin. Spin-charge conversion is a related technique for efficient spin readout. It exploits spin-dependent photoionization of the NV center into its neutral charge state, which can be detected with high fidelity by fluorescence readout. In the project, these techniques shall be implemented on shallow NV centers few nanometers below the diamond surface as they are required for sensing of external electron and nuclear spins. Subsequently, they shall be combined to a technique merging the advantages of either implementation. Finally, the improvement in sensitivity shall be exploited to demonstrate spectroscopy of chemically relevant spectral features in a nano-magnetic resonance experiment, such as chemical shifts or J-couplings.

该项目的目标是在金刚石中NV中心检测的纳米级核磁共振和EPR实验中，在灵敏度上获得一个数量级，在光谱分辨率上获得两个数量级，并利用这一进展在纳米核磁共振实验中检测化学相关的光谱特征。这一改进将通过结合最近开发的两种更有效地读取NV中心电子自旋到纳米级磁共振实验中的技术来实现：核量子存储器[1]对NV中心的单次自旋读取和自旋-电荷转换[2]的有效荧光读取。核量子存储器单次读出技术是一种克服荧光读出NV中心电子自旋检测效率低的技术。它将采集时间减少了两个数量级，或者，同样地，通过存储和重复读取量子存储器中的测量结果，将灵敏度提高了一个数量级，例如由NV中心氮核自旋形成。自旋-电荷转换是一种有效的自旋读出技术。它利用NV中心的自旋依赖光电离进入其中性电荷状态，这可以通过荧光读出高保真度检测到。在该项目中，这些技术将在金刚石表面以下几纳米的浅NV中心实施，因为它们是感知外部电子和核自旋所必需的。随后，它们将被组合成一种技术，融合了任一实现的优点。最后，灵敏度的提高将用于在纳米磁共振实验中展示化学相关光谱特征的光谱学，如化学位移或j -耦合。