Journal
OPTICS EXPRESS
Volume 26, Issue 4, Pages 3988-3994Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.26.003988
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Funding
- National Natural Science Foundation of China (NSFC) [61675137, 61425007, 61635007]
- Guangdong Natural Science Foundation [2015B010105007, 2014A030308007, 2015A030310243]
- Education Department of Guangdong Province [2015KTSCX119]
- Science and Technology Innovation Commission of Shenzhen [JCYJ20160307143501276, JCYJ20160427104925452]
- Development and Reform Commission of Shenzhen Municipality foundation
- Open Fund of the Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications (Jinan University)
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A highly sensitive refractive index sensor based on surface plasmon resonance in a side-polished low-index polymer optical fiber is proposed for biosensing. Benefitting from the low refractive index of the fiber core, the sensitivity of the device can reach similar to 44567 nm/RIU theoretically for aqueous solutions, at the expense of a lowered upper detection limit that is down to similar to 1.340. The sensor is fabricated by coating 55-nm-thick Au-film on the polished surface of a graded-index perfluorinated polymer optical fiber. Results show that the sensor exhibits a sensitivity of similar to 22779 nm/RIU at 1.335 with a figure of merit of 61.2. When employed for glucose sensing, the sensor presents an averaged sensitivity of 24.50 nm/wt%, or 0.46 nm/mM. This device is expected to have potential applications in cost-effective bioand chemical-sensing. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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