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论文类型：期刊论文

发表时间：2018-05-15

发表刊物：IEEE PHOTONICS TECHNOLOGY LETTERS

收录刊物：SCIE、Scopus

卷号：30

期号：10

页面范围：927-930

ISSN号：1041-1135

关键字：Surface plasmon resonance; dual color; smartphone based; fiber optic sensor

摘要：A novel red-green dual color fiber optic surface plasmon resonance (SPR) sensor based on smartphone has been proposed. Instead of using narrowband filters or diffraction gratings to get spectral data as those smartphone-based SPR sensors reported so far, we propose to utilize the inherent color selectivity of phone cameras to monitor red and green color channels simultaneously, which can reduce the chance of false detection and improve the sensitivity. An Ag/Au bilayer structure SPR sensor was employed in order to perform SPR at the central region of the visible spectrum in aqueous environment and improve the sensitivity. Experimental results show that it has a quadratic response in the refractive index (RI) range of 1.325-1.344 (R-2= 0.992) and a linear response in the RI range of 1325-1330, with a sensitivity of 18.59/RIU and a resolution of 5.3 x 10(-4) RIU. This novel SPR sensor has great potential as point-of-care and point-of-need platforms for healthcare, food safety, and environmental monitoring, especially in remote and rural areas.