High-sensitivity temperature sensing on an ensemble of nitrogen-vacancy centers in diamond
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2022-06-20 |
| Journal | Japanese Journal of Applied Physics |
| Authors | Wu Da-Jin, Zhonghao Li, Zhenrong Shi, Hao Guo, Jun Tang |
| Institutions | North University of China |
| Citations | 3 |
Abstract
Section titled āAbstractāAbstract We demonstrate a method for thermal detection that is the sensitivity 6.2 mK Hz ā1 2 , which uses the frequency lock closed-loop scheme to track Zeeman-split resonance of nitrogen-vacancy (NV) centers in diamond. The NV diamond surface acts as a temperature measurement sensor to transfer the temperature variation as D ( T ) parameter change to lead to the movement of the energy levels to detect the temperature. By frequency modulation technology and closed-loop feedback locking technology, automatic temperature detection and step signal reading are realized, with a resolution of 7.6 mK. It is found that the closed-loop output is basically unchanged, while the open-loop output has an error signal proportional to the laser fluctuation. The closed-loop feedback technique can improve the stability and resolution of the system and provides a method for measuring the actual temperature detection. Such a demonstration marks a vital advance in transitioning the NV thermometer from a laboratory system to a functional device for detecting temperature fields in a practical environment.