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Volume 13
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10.3390/cryst13060972
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Article

A Dual-Core Surface Plasmon Resonance-Based Photonic Crystal Fiber Sensor for Simultaneously Measuring the Refractive Index and Temperature

by
Wangyoyo Li
1,
Yu Chen
2,
Jianjie Xu
2,
Menglin Jiang
3 and
Hui Zou
3,*
1
Bell Honors School, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
2
Portland Institute, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
3
College of Electronic and Optical Engineering, College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, China
*
Author to whom correspondence should be addressed.
Crystals 2023, 13(6), 972; https://doi.org/10.3390/cryst13060972
Submission received: 22 May 2023 / Revised: 15 June 2023 / Accepted: 16 June 2023 / Published: 19 June 2023
(This article belongs to the Special Issue Recent Advances in Photonic Crystal and Optical Devices)
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Abstract

In this correspondence, a new photonic crystal fiber biosensor structure on the basis of surface plasmon resonance is proposed for the measurement of the refractive index (RI) and TSM temperature simultaneously. In this design, the central and external surface of the biosensor structure are coated with thin gold film. A hole adjacent to the inner gold film is filled with temperature-sensitive material (TSM). With the implementation of internal and external gold coatings along with TSM, the biosensor achieves the measurement of the RI and temperature with two disjoint wavelength coverage. Numerical simulations and calculation results illustrate that the average wavelength sensitivity of the biosensor structure, respectively, achieves 7080 nm/RIU and 3.36 nm/°C with RI coverage from 1.36 to 1.41 and temperature coverage from 0 to 60 °C. Moreover, benefiting from realization of different wavelength regions in RI and temperature sensing, it is believed that the proposed biosensor structure for the measurement of the RI and temperature will have range applications in the fields of medical diagnostics and environmental assessments.
Keywords: photonic crystal fiber; surface plasmon resonance; refractive index sensor; temperature sensor photonic crystal fiber; surface plasmon resonance; refractive index sensor; temperature sensor

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MDPI and ACS Style

Li, W.; Chen, Y.; Xu, J.; Jiang, M.; Zou, H. A Dual-Core Surface Plasmon Resonance-Based Photonic Crystal Fiber Sensor for Simultaneously Measuring the Refractive Index and Temperature. Crystals 2023, 13, 972. https://doi.org/10.3390/cryst13060972

AMA Style

Li W, Chen Y, Xu J, Jiang M, Zou H. A Dual-Core Surface Plasmon Resonance-Based Photonic Crystal Fiber Sensor for Simultaneously Measuring the Refractive Index and Temperature. Crystals. 2023; 13(6):972. https://doi.org/10.3390/cryst13060972

Chicago/Turabian Style

Li, Wangyoyo, Yu Chen, Jianjie Xu, Menglin Jiang, and Hui Zou. 2023. "A Dual-Core Surface Plasmon Resonance-Based Photonic Crystal Fiber Sensor for Simultaneously Measuring the Refractive Index and Temperature" Crystals 13, no. 6: 972. https://doi.org/10.3390/cryst13060972

APA Style

Li, W., Chen, Y., Xu, J., Jiang, M., & Zou, H. (2023). A Dual-Core Surface Plasmon Resonance-Based Photonic Crystal Fiber Sensor for Simultaneously Measuring the Refractive Index and Temperature. Crystals, 13(6), 972. https://doi.org/10.3390/cryst13060972

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