Fiber-coupled silicon carbide divacancy magnetometer and thermometer

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 divacanc...

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Bibliographic Details
Published in:Optics express 2023-05, Vol.31 (10), p.15592-15598
Main Authors: Quan, Wei-Ke, Liu, Lin, Luo, Qin-Yue, Liu, Xiao-Di, Wang, Jun-Feng
Format: Article
Language:English
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Summary: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.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.483411