Temperature Sensor Based on Hollow Fiber Filled with Graphene-Ag Composite Nanowire and Liquid |
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Authors: | Xianchao Yang Ying Lu Liangcheng Duan Baolin Liu Jianquan Yao |
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Institution: | 1.College of Precision Instrument and Opto-electronics Engineering, Key Laboratory of Opto-electronics Information Technology (Ministry of Education),Tianjin University,Tianjin,People’s Republic of China |
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Abstract: | A temperature sensor based on hollow fiber (HF) filled with graphene-Ag composite nanowire and liquid is presented. The coupling properties and sensing performance are numerically analyzed by finite element method using wavelength and amplitude interrogations. Results show that the sensor exhibiting strong birefringence with x-polarized peak provides much higher sensitivities and better signal-to-noise ratio (SNR) than y-polarized, which is more suitable for temperature detection. The graphene-Ag composite nanowire can not only solve the oxidation problem but also avoid the metal coating. Moreover, it provides better performance than other similar works like Au-Ag nanowire-filled, Au nanowire-filled, and Ag nanowire-filled sensors. Contrary to the blue shift of traditional SPR temperature sensors, the resonance peak shifts to the longer wavelength in our device when temperature increases and the high sensitivity 9.44 nm/ °C is obtained. The influences of nanowire diameter, grapheme-layer thickness on the designed sensor, are also investigated. This work can provide a reference for developing a high sensitivity, real-time, remote sensing, and distributed temperature SPR sensor. |
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