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arXiv · 1907.11309

Thermal-demagnetization-enhanced hybrid fiber-based thermometer coupled with nitrogen-vacancy centers

Shao-Chun Zhang·Shen Li·Bo Du·Yang Dong·Yu Zheng·Hao-Bin Lin·Bo-Wen Zhao·Wei Zhu·Guan-Zhong Wang·Xiang-Dong Chen·Guang-Can Guo·Fang-Wen Sun
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Abstract

Nitrogen-vacancy centers in diamond are attractive as quantum sensors owing to their remarkable optical and spin properties under ambient conditions. Here we experimentally demonstrated a hybrid fiber-based thermometer coupled with nitrogen-vacancy center ensemble and a permanent magnet, where the temperature sensitivity was improved by converting the temperature variation to the magnetic field change based on the thermal-demagnetization of the permanent magnet. We have achieved both large temperature working range (room temperature to 373 K) and millikelvin sensitivity (1.6 mK/sqrt(Hz)), nearly 6-fold improvement compared with conventional technique. This stable and compact hybrid thermometer will enable a wide range of applications for large-area detection and imaging with high temperature sensitivity.

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Shao-Chun Zhang, Shen Li, Bo Du, Yang Dong, Yu Zheng, Hao-Bin Lin, Bo-Wen Zhao, Wei Zhu, Guan-Zhong Wang, Xiang-Dong Chen, Guang-Can Guo, Fang-Wen Sun. 2019-05-09. Thermal-demagnetization-enhanced hybrid fiber-based thermometer coupled with nitrogen-vacancy centers. https://arxiv.org/abs/1907.11309

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