Opt Express. 2023 May 8;31(10):15592-15598. doi: 10.1364/OE.483411.
Divacancy in silicon carbide has become an important solid-state system for quantum metrologies. To make it more beneficial for practical applications, we realize a fiber-coupled divacancy-based magnetometer and thermometer simultaneously. First, we realize an efficient coupling between the divacancy in a silicon carbide slice with a multimode fiber. Then the optimization of the power broadening in optically detected magnetic resonance (ODMR) of divacancy is performed to obtain a higher sensing sensitivity of 3.9 μT/Hz. We then use it to detect the strength of an external magnetic field. Finally, we use the Ramsey methods to realize a temperature sensing with a sensitivity of 163.2 mK/Hz. The experiments demonstrate that the compact fiber-coupled divacancy quantum sensor can be used for multiple practical quantum sensing.
碳化硅中的空位已成为量子计量学中的一个重要固态系统。为了使其更有益于实际应用，我们同时实现了基于碳化硅空位的光纤耦合磁力计和温度计。首先，我们实现了碳化硅片上的空位与多模光纤之间的有效耦合。然后，通过优化光学检测磁共振（ODMR）中碳化硅空位的功率展宽，获得了更高的传感灵敏度 3.9 μT/Hz。接着，我们使用它来检测外部磁场的强度。最后，我们使用拉姆齐方法实现了灵敏度为 163.2 mK/Hz 的温度传感。实验证明，这种紧凑的光纤耦合碳化硅空位量子传感器可用于多种实际的量子传感。
