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Updated: Sep 16, 2025

Fabrication and Testing of Photonic Thermometers
Published on: October 24, 2018
Integrated NV Center-Based Temperature Sensor for Internal Thermal Monitoring in Optical Waveguides
Yifan Zhao1,2,3, Shihan Ding4, Shuo Wang1,5
1College of Physics and Optoelectronic Engineering, Ocean University of China, Qingdao 266100, China.
None:
Color centers in solids, such as nitrogen-vacancy (NV) centers in diamonds, have gained significant attention in recent years due to their exceptional properties for quantum sensing. In this work, we demonstrate an NV center-based temperature sensor integrated into an optical waveguide to enable internal temperature sensing. A surface-cladding optical waveguide was fabricated in a diamond wafer containing NV centers using femtosecond laser direct writing. By analyzing the resonant peaks of optically detected magnetic resonance (ODMR) spectra, we established a precise correlation between temperature changes induced by the pump laser and shifts in the ODMR peak positions. This approach enabled temperature monitoring with a sensitivity of 1.1 mK/Hz. These results highlight the significant potential of color centers in solids for non-contact, micro-scale temperature monitoring.
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