Formation and characterisation of ultrasensitive surface plasmon resonance sensor based upon a nano-scale corrugated multi-layered coated D-shaped optical fibre
Formation and characterisation of ultrasensitive surface plasmon resonance sensor based upon a nano-scale corrugated multi-layered coated D-shaped optical fibre
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基于纳米级波纹多层涂层D形光纤的超灵敏表面等离子体共振传感器的形成和表征
DOI：
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
I. Bennion
中科院分区：
文献类型：
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作者：
T. Allsop;R. Neal;C. Mou;K. Kalli;S. Saied;S. Rehman;D. Webb;J. Sullivan;I. Bennion
我们介绍了一系列涂层d形光纤传感器的性能实验结果，这些传感器对外部折射率具有高光谱灵敏度。通过使用特定的材料作为多层涂层的一部分，增强了对所选指数范围和光纤芯模式与表面等离子体共振（SPR）耦合的灵敏度。我们提出了强有力的证据，表明这种效应通过层状涂层的紫外线辐射增强，导致纳米级表面起伏波纹结构的形成，从而在纤维芯内产生指数扰动，从而增强耦合。在对光纤器件建模时，我们找到了合理的共识。研究发现，SPR器件在空气中工作时具有超过40dB的高耦合效率，光谱灵敏度优于典型的长周期光栅，其中一个器件在重要的水折射率区产生了12000nm/RIU的波长光谱灵敏度。该装置在一个非常大的波长范围内产生表面等离子体共振；（2m可见）通过交替照射光的偏振状态。
We present experimental results on the performance of a series of coated, D-shaped optical fibre sensors that display high spectral sensitivities to external refractive index. Sensitivity to the chosen index regime and coupling of the fiber core mode to the surface plasmon resonance (SPR) is enhanced by using specific materials as part of a multi-layered coating. We present strong evidence that this effect is enhanced by post ultra-violet radiation of the lamellar coating that results in the formation of a nano-scale surface relief corrugation structure, which generates an index perturbation within the fibre core that in turn enhances the coupling. We have found reasonable agreement when modelling the fibre devices. It was found that the SPR devices operate in air with high coupling efficiency in excess of 40dB with spectral sensitivities that outperform a typical long period grating, with one device yielding a wavelength spectral sensitivity of 12000nm/RIU in the important aqueous index regime. The devices generate surface plasmon resonances over a very large wavelength range; (visible to 2m) by alternating the polarisation state of the illuminating light.
DOI：
10.1364/josab.25.000481
发表时间：
2008-04-01
影响因子：
1.9
作者：
Allsop, T.;Neal, R.;Bennion, I.
通讯作者：
Bennion, I.