A surface plasmon resonance hydrogen sensor using Au/Ta2O5/Pd multi-layers on hetero-core optical fiber structures
A surface plasmon resonance hydrogen sensor using Au/Ta2O5/Pd multi-layers on hetero-core optical fiber structures
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DOI：
10.1016/j.snb.2013.04.072
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发表时间：
2013-08-01
影响因子：
8.4
通讯作者：
Watanabe, Kazuhiro
中科院分区：
文献类型：
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作者：
Hosoki, Ai;Nishiyama, Michiko;Watanabe, Kazuhiro
研制了一种新型的光纤表面等离子体共振(SPR)氢传感器，该传感器基于异质芯结构光纤，在圆柱形包层表面均匀涂覆了金(Au)、五氧化二钽(Ta2O5)和钯(Pd)多层膜。实验观察到，当氮气中氢浓度为4%时，SPR共振波长移动了28 nm。在波长为850 nm的发光二极管的光强实验中，在25 nm Au、60 nm Ta2O5和3 nm Pd多层膜的情况下，对4%氢气的响应时间为15 S，产生了0.23dB的传输损耗变化。尽管使用了非常薄的Pd薄膜，所提出的传感器仍然成功地检测到了高灵敏度的氢浓度。(C)2013爱思唯尔B.V.保留所有权利。
A novel fiber optic surface plasmon resonance (SPR) hydrogen sensor has been developed based on hetero-core structured fiber optics with multi-layer films of gold (Au), tantalum pentaoxide (Ta2O5) and palladium (Pd) uniformly coated onto a cylindrical cladding surface. We experimentally observed that the SPR resonant wavelength is shifted 28 nm with 4%-hydrogen concentration in nitrogen. In a light intensity-based experiment with an LED operating at 850 nm, it has been presented that a transmitted loss change of 0.23 dB was induced with a response time of 15 s for 4% hydrogen in the case of 25-nm Au, 60-nm Ta2O5 and 3-nm Pd multi-layer film. The proposed sensor has successfully detected hydrogen concentrations with a high sensitivity despite the usage of very thin Pd films. (C) 2013 Elsevier B.V. All rights reserved.