Graphene-Gold-Au@Ag NPs-PDMS Films Coated Fiber Optic for Refractive Index and Temperature Sensing

A novel fiber-optic refractive index (RI) and temperature sensor based on a multimode-single-mode-multimode fiber (MMF-SMF-MMF) structure coated with graphene-metal hybrid films was proposed and investigated. The surface plasmon resonance (SPR)-based RI sensitivity is improved by the addition of the...

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Bibliographic Details
Published in:IEEE photonics technology letters 2019-08, Vol.31 (15), p.1205-1208
Main Authors: Huang, Qing, Wang, Yong, Zhu, Wenjie, Lai, Tianting, Peng, Jiankun, Lyu, Dajuan, Guo, Donglai, Yuan, Yinquan, Lewis, Elfed, Yang, Minghong
Format: Article
Language:English
Subjects:
Au@Ag nanoparticles
Clean energy
Coated fibers
Environmental protection
Fiber optics
Gold
Gold coatings
Graphene
Nanoparticles
Optical fiber
Optical fibers
Optical surface waves
Polydimethylsiloxane
Protective coatings
refractive index
Refractivity
Sensitivity
Silicone resins
Silver
surface plasmon resonance
temperature
Temperature sensors
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Summary:A novel fiber-optic refractive index (RI) and temperature sensor based on a multimode-single-mode-multimode fiber (MMF-SMF-MMF) structure coated with graphene-metal hybrid films was proposed and investigated. The surface plasmon resonance (SPR)-based RI sensitivity is improved by the addition of the graphene layer above or below the gold coating of the fiber and then further enhanced with the addition of gold-silver core-shell nanoparticles (Au@Ag NPs). Furthermore, the surface of graphene-Au-Au@Ag NPs film was modified with polydimethylsiloxane (PDMS) for temperature sensing, achieving a high sensitivity of −1.02 nm/°C with good repeatability. This new structure with graphene-gold-Au@Ag NPs-PDMS hybrid films shows applications in many fields, including environmental protection, clean energy, and nano-medicine.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2019.2921021