In this work, we propose a 10 μm-scale spin-based sensor structure, which mainly consists of a nanowire (NW) ring resonator laser, nitrogen-vacancy (NV) defects in a nanodiamond (ND) and a microwave (MW) antenna. The NW laser was bent into a ring with a gap to pump the NV defects in the ND which was assembled in the gap with the diameter of ~8 μm. And the fluorescent light of NV defects was enhanced by the NW ring resonator about 8 times. Furthermore, the NW laser pulse was produced by the optical switch and a simple plus-sequences was designed to get the Rabi oscillation signal. Based on the Rabi oscillation, a Ramsey-type sequence was used to detect the magnetic field with the sensitivity of 83 nT √Hz-1 for our 10 μm-scale spin-based sensor structure. It proves the spin state in our structure allows for coherent spin manipulation for more complex quantum control schemes. And our structure fulfills the fundamental requirements to develop chip-scale spin-based sensors.

中文翻译：

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通过纳米线环形谐振腔激光器泵浦和增强 NV 中心以集成 10 μm 尺度的基于自旋的传感器结构

在这项工作中，我们提出了一种 10 μm 尺度的基于自旋的传感器结构，主要由纳米线 (NW) 环形谐振腔激光器、纳米金刚石 (ND) 中的氮空位 (NV) 缺陷和微波 (MW) 天线组成. 将 NW 激光器弯曲成具有间隙的环，以泵浦 ND 中的 NV 缺陷，该 ND 缺陷组装在直径为~8 μm 的间隙中。NW环形谐振器将NV缺陷的荧光增强了约8倍。此外，NW激光脉冲由光开关产生，并设计了一个简单的加序列来获得Rabi振荡信号。基于 Rabi 振荡，我们使用 Ramsey 型序列检测磁场，灵敏度为 83 nT √Hz-1，用于我们的 10 μm 尺度自旋传感器结构。它证明了我们结构中的自旋态允许对更复杂的量子控制方案进行相干自旋操纵。我们的结构满足了开发芯片级自旋传感器的基本要求。