arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2111.09201quant-ph
收藏

纳米级NMR信号与NV-金刚石芯片的几何关系

Geometry dependence of micron-scale NMR signals on NV-diamond chips

Fleming Bruckmaier, Karl Briegel, Dominik B. Bucher

摘要:

近年来,由于利用氮空位(NV)中心的量子传感领域的快速发展,小体积核磁共振光谱(NMR)技术取得了相当大的进展。金刚石晶格中的这些光学活性缺陷已被用于探测具有高光谱分辨率的皮升范围内前所未有的小体积。然而,NMR信号的大小强烈地依赖于金刚石传感器和样品的几何形状。利用样品自旋偶极矩的Monte-Carlo积分,分析了不同几何结构的NV中心沿取向的磁场投影。我们表明,NMR信号强烈依赖于NV中心相对于金刚石表面的取向。虽然目前使用的平面金刚石传感器的信号作为样本体积的函数收敛,但更优化的几何形状导致几何发散的信号。最后,我们模拟了球形,圆柱形和近2D样品体积的预期信号,涵盖了NV-NMR中有趣应用的相关几何形状,如单细胞生物学或基于NV的超极化。研究结果为微观物体的NV-NMR谱研究提供了指导。关键词:氮空位中心,核磁共振,蒙特卡罗,量子传感,样品几何形状,小体积核磁共振。

英文摘要:

Small volume nuclear magnetic resonance spectroscopy (NMR) has recently made considerable progress due to rapid developments in the field of quantum sensing using nitrogen vacancy (NV) centers. These optically active defects in the diamond lattice have been used to probe unprecedented small volumes on the picoliter range with high spectral resolution. However, the NMR signal size depends strongly on both the diamond sensor's and sample's geometry. Using Monte-Carlo integration of sample spin dipole moments, the magnetic field projection along the orientation of the NV center for different geometries has been analysed. We show that the NMR signal strongly depends on the NV-center orientation with respect to the diamond surface. While the signal of currently used planar diamond sensors converges as a function of the sample volume, more optimal geometries lead to a logarithmically diverging signal. Finally, we simulate the expected signal for spherical, cylindrical and nearly-2D sample volumes, covering relevant geometries for interesting applications in NV-NMR such as single-cell biology or NV-based hyperpolarization. The results provide a guideline for NV-NMR spectroscopy of microscopic objects. Keywords: Nitrogen vacancy center, nuclear magnetic resonance, Monte-Carlo, quantum sensing, sample geometry, small volume NMR.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑