Fiber-integrated silicon carbide silicon-vacancy-based magnetometer

Silicon vacancies in silicon carbide have drawn much attention for various types of quantum sensing. However, most previous experiments are realized using confocal scanning systems, which limits their practical applications. In this work, we demonstrate a compact fiber-integrated silicon carbide sil...

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Bibliographic Details
Published in:Optics letters 2023-03, Vol.48 (6), p.1423-1426
Main Authors: Quan, Wei-Ke, Liu, Lin, Luo, Qin-Yue, Liu, Xiao-Di, Wang, Jun-Feng
Format: Article
Language:English
Subjects:
Geophysics
Magnetic fields
Magnetic resonance
Magnetometers
Optical fibers
Room temperature
Silicon carbide
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Summary:Silicon vacancies in silicon carbide have drawn much attention for various types of quantum sensing. However, most previous experiments are realized using confocal scanning systems, which limits their practical applications. In this work, we demonstrate a compact fiber-integrated silicon carbide silicon-vacancy-based magnetometer at room temperature. First, we effectively couple the silicon vacancy in a tiny silicon carbide slice with an optical fiber tip and realize the readout of the spin signal through the fiber at the same time. We then study the optically detected magnetic resonance spectra at different laser and microwave powers, obtaining an optimized magnetic field sensitivity of 12.3  T/Hz . Based on this, the magnetometer is used to measure the strength and polar angle of an external magnetic field. Through these experiments, we have paved the way for fiber-integrated silicon-vacancy-based magnetometer applications in practical environments, such as geophysics and biomedical sensing.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.476305