Li Rui, Kong Fei, Zhao Pengju, Cheng Zhi, Qin Zhuoyang, Wang Mengqi, Zhang Qi, Wang Pengfei, Wang Ya, Shi Fazhan, Du Jiangfeng
Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, China.
CAS Key Laboratory of Microscale Magnetic Resonance, University of Science and Technology of China, Hefei, 230026, China.
Phys Rev Lett. 2020 Jun 19;124(24):247701. doi: 10.1103/PhysRevLett.124.247701.
The nitrogen-vacancy (NV) center is a potential atomic-scale spin sensor for electric field sensing. However, its natural susceptibility to the magnetic field hinders effective detection of the electric field. Here we propose a robust electrometric method utilizing continuous dynamic decoupling (CDD) technique. During the CDD period, the NV center evolves in a dressed frame, where the sensor is resistant to magnetic fields but remains sensitive to electric fields. As an example, we use this method to isolate the electric noise from a complex electromagnetic environment near diamond surface via measuring the dephasing rate between dressed states. By reducing the surface electric noise with different covered liquids, we observe an unambiguous relation between the dephasing rate and the relative dielectric permittivity of the liquid, which enables a quantitative investigation of electric noise model near the diamond surface.
氮空位（NV）中心是一种用于电场传感的潜在原子尺度自旋传感器。然而，其对磁场的天然敏感性阻碍了电场的有效检测。在此，我们提出一种利用连续动态解耦（CDD）技术的稳健的电测方法。在CDD期间，NV中心在缀饰框架中演化，其中传感器对磁场具有抗性，但对电场仍保持敏感。例如，我们使用此方法通过测量缀饰态之间的退相速率，从金刚石表面附近的复杂电磁环境中分离出电噪声。通过用不同的覆盖液体降低表面电噪声，我们观察到退相速率与液体相对介电常数之间明确的关系，这使得对金刚石表面附近的电噪声模型进行定量研究成为可能。
