Enhancing the sensitivity of a single electron spin sensor by multi-frequency control
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2018-08-13 |
| Journal | Applied Physics Letters |
| Authors | Cuihong Li, Dong Yang, Jingyan Xu, Dengfeng Li, Xiang-Dong Chen |
| Institutions | University of Chinese Academy of Sciences, University of Science and Technology of China |
| Citations | 14 |
Abstract
Section titled āAbstractāThe negatively charged nitrogen vacancy (NV) center in diamond is increasingly attractive as a solid-state quantum sensor with high sensitivity and spatial resolution. However, the host non-zero nitrogen nuclear spin of the NV center decreases the signal contrast and sensitivity because of hyperfine coupling. Here, we apply multi-frequency synchronous manipulation to the NV center to recover the signal contrast and enhance the sensitivity. The enhancement effect works over a wide range of bias magnetic fields. Compared to the single-frequency-driven sensing process, a sensitivity enhancement factor of 2.7 is achieved at a low bias magnetic field. Such multi-frequency-controlled sensitivity enhancement works also for sensing temperature, strain, and electric field and can be applied to other spin-spin coupling systems.