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Open AccessArticle

A Diamond Temperature Sensor Based on the Energy Level Shift of Nitrogen-Vacancy Color Centers

1
Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, China
2
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3
College of Science, Henan University of Technology, Zhengzhou 10463, China
4
Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
5
Advanced Nano-processing Engineering Lab, Mechanical Engineering, Kogakuin University, Tokyo 192-0015, Japan
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Nanomaterials 2019, 9(11), 1576; https://doi.org/10.3390/nano9111576
Received: 30 September 2019 / Revised: 25 October 2019 / Accepted: 30 October 2019 / Published: 7 November 2019
(This article belongs to the Special Issue Nanobiophotonics, Photomedicine, and Imaging)
The nitrogen-vacancy (NV) color center in chemical vapor deposition (CVD) diamond has been widely investigated in quantum information and quantum biosensors due to its excellent photon emission stability and long spin coherence time. However, the temperature dependence of the energy level of NV color centers in diamond is different from other semiconductors with the same diamond cubic structure for the high Debye temperature and very small thermal expansion coefficient of diamond. In this work, a diamond sensor for temperature measurement with high precision was fabricated based on the investigation of the energy level shifts of NV centers by Raman and photoluminescence (PL) spectra. The results show that the intensity and linewidth of the zero-phonon line of NV centers highly depend on the environmental temperature, and the energy level shifts of NV centers in diamond follow the modified Varshni model very well, a model which is better than the traditional version. Accordingly, the NV color center shows the ability in temperature measurement with a high accuracy of up to 98%. The high dependence of NV centers on environmental temperature shows the possibility of temperature monitoring of NV center-based quantum sensors in biosystems. View Full-Text
Keywords: diamond temperature sensor; nitrogen-vacancy (NV) color center; temperature dependence; energy level shifts; zero-phonon line (ZPL); modified Varshni model diamond temperature sensor; nitrogen-vacancy (NV) color center; temperature dependence; energy level shifts; zero-phonon line (ZPL); modified Varshni model
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Yang, M.; Yuan, Q.; Gao, J.; Shu, S.; Chen, F.; Sun, H.; Nishimura, K.; Wang, S.; Yi, J.; Lin, C.-T.; Jiang, N. A Diamond Temperature Sensor Based on the Energy Level Shift of Nitrogen-Vacancy Color Centers. Nanomaterials 2019, 9, 1576.

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