Abstract
In this study, we experimentally demonstrate a miniature fiber thermometer based on tip-integrated ZnO-nanowire-nanograting. The sensor has a diameter less than 1 µm and the length of the Bragg grating is sub-10 µm. The ZnO-nanowire-nanograting is sensitive to the environmental temperature change. Thus, the intensity of the light whose wavelength is in the rising or falling region of the nanograting spectrum will vary with the shift in wavelength due to change in temperature. Taking one wavelength (655 nm) in the rise linear region of the nanograting spectrum, a sensitivity of 0.066 nW/°C in the air is achieved experimentally. The proposed temperature sensor has the superiorities of compactness, stableness, and easy fabrication compared to regular fiber grating sensors, offering great potential for detecting inside minimal volume environments.
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Acknowledgment
This study was supported by the National Natural Science Foundation of China (Grants Nos. 62035006 and 62005118).
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Cao, H., Li, D., Zhou, K. et al. Demonstration of a ZnO-Nanowire-Based Nanograting Temperature Sensor. Photonic Sens 13, 230123 (2023). https://doi.org/10.1007/s13320-022-0663-8
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DOI: https://doi.org/10.1007/s13320-022-0663-8