Journal
OPTICS EXPRESS
Volume 23, Issue 13, Pages 17179-17184Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.23.017179
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- Wege in die Forschung- Leibniz Universitat Hannover
- Deutsche Forschungsgemeinschaft
- Open Access Publishing Fund of Leibniz Universitat Hannover
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A fibre optic surface plasmon resonance (SPR) sensor system for smartphones is reported, for the first time. The sensor was fabricated by using an easy-to-implement silver coating technique and by polishing both ends of a 400 mu m optical fibre to obtain 45 degrees end-faces. For excitation and interrogation of the SPR sensor system the flash-light and camera at the back side of the smartphone were employed, respectively. Consequently, no external electrical components are required for the operation of the sensor system developed. In a first application example a refractive index sensor was realised. The performance of the SPR sensor system was demonstrated by using different volume concentrations of glycerol solution. A sensitivity of 5.96.10(-4) refractive index units (RIU)/pixel was obtained for a refractive index (RI) range from 1.33 to 1.36. In future implementations the reported sensor system could be integrated in a cover of a smartphone or used as a low-cost, portable point-of-care diagnostic platform. Consequently it offers the potential of monitoring a large variety of environmental or point-of-care parameters in combination with smartphones. (C) 2015 Optical Society of America
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