학술논문

An Integrated Nitrogen-Vacancy Magnetometer With Subnanotesla Sensitivity for Practical Applications
Document Type
Periodical
Source
IEEE Sensors Journal IEEE Sensors J. Sensors Journal, IEEE. 24(21):34198-34204 Nov, 2024
Subject
Signal Processing and Analysis
Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Robotics and Control Systems
Fluorescence
Diamonds
Magnetometers
Surface emitting lasers
Sensors
Laser excitation
Sensitivity
laser noise
magnetometer
nitrogen-vacancy (NV) centers
Language
ISSN
1530-437X
1558-1748
2379-9153
Abstract
The practical applications require the nitrogen-vacancy (NV) magnetometer to be transportable and highly sensitive. In this study, we have demonstrated a portable NV magnetometer consisting of a sensor head and miniaturized control system with a volume of $22\times 19\times 12$ cm, which can operate outside the laboratory when connected to a computer. The sensor exhibited a sensitivity of 892.7 pT/Hz $^{\text {1/2}}$ , achieved through the use of a fluorescence omni-directional reflection concentrator (FORC) and common mode laser noise rejection (CMR) technology. Notably, the FORC increased the fluorescence collection efficiency to 57% by allowing the collection of fluorescence emitted from all six facets of the diamond. Our work is expected to facilitate the transition of NV magnetometers from a laboratory platform to practical applications.