A Microfabricated Diamond Quantum Magnetometer with Picotesla Scale Sensitivity
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2023-01-15 |
| Authors | Fei Xie, Qihui Liu, Yuqiang Hu, Lingyun Li, Zhichao Chen |
| Institutions | State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology |
| Citations | 5 |
Abstract
Section titled āAbstractāThis research reports a microfabricated diamond quantum magnetometer based on ensemble nitrogen-vacancy (NV) centers. The sensor device is fabricated with a standard MEMS process and integrated with optical fiber and photodiode (PD). The sensitivity of the sensor and signal-to-noise ratio (SNR) are determined by the detection efficiency of photons emitted from NVs in bulk diamonds. The miniaturized and portable diamond sensor shows a 132-fold enhancement of fluorescence collection efficiency over the fiber confocal system and an unshielded sensitivity of 334 pTā¢Hz <sup xmlns:mml=āhttp://www.w3.org/1998/Math/MathMLā xmlns:xlink=āhttp://www.w3.org/1999/xlinkā>-1/2</sup> under ambient conditions. The essential sensor component is 1Ć1Ć0.1 cm <sup xmlns:mml=āhttp://www.w3.org/1998/Math/MathMLā xmlns:xlink=āhttp://www.w3.org/1999/xlinkā>3</sup> in volume. Sensors with improved integration and sensitivity are possible to be used for practical applications, such as magnetocardiography and precision current sensing.