Guo Hao, Gao Yanjie, Qin Yue, Wang Shixin, Liu Yusong, Zhang Zhenrong, Li Zhonghao, Wen Huanfei, Tang Jun, Ma Zongmin, Li Yanjun, Liu Jun
Key Laboratory of Instrumentation Science and Dynamic Measurement. School of Instrument and Electronics, North University of China, Taiyuan 030051, People's Republic of China.
Department of Applied Physics, Graduate School of Engineering, Osaka University, 2-1 Yamada-Oka, Suita, Osaka 565-0871, Japan.
Nanotechnology. 2021 Jan 29;32(5):055502. doi: 10.1088/1361-6528/abc20b.
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 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.
在这项工作中，我们提出了一种10微米尺度的基于自旋的传感器结构，它主要由一个纳米线（NW）环形谐振器激光器、纳米金刚石（ND）中的氮空位（NV）缺陷和一个微波（MW）天线组成。NW激光器被弯曲成一个有间隙的环，以泵浦位于间隙中、直径约为8微米的ND中的NV缺陷。并且，NV缺陷的荧光通过NW环形谐振器增强了约8倍。此外，NW激光脉冲由光开关产生，并设计了一个简单的脉冲序列来获取拉比振荡信号。基于拉比振荡，使用拉姆齐型序列来检测磁场，对于我们的10微米尺度基于自旋的传感器结构，其灵敏度为83 nT √Hz。这证明了我们结构中的自旋态允许进行更复杂量子控制方案的相干自旋操纵。并且我们的结构满足了开发芯片级基于自旋的传感器的基本要求。
