This paper reports the fabrication and testing of two configurations of optical sensor systems based on Surface Plasmon Resonance (SPR) at the interface of a liquid sample and sandwiched structures realized starting from the exposed core of a Plastic Optical Fiber (POF). The proposed geometries have proven to be suitable for measuring the refractive indexes of liquids whose refractive index falls around 1.35. Furthermore, the proposed sensing head, being low cost and relatively easy to realize, may be very attractive for biosensor implementation.
References
[1]
Anuj, K.; Sharma, R.J.; Gupta, B.D. Fiber-Optic Sensors Based on Surface Plasmon Resonance: A Comprehensive Review. IEEE Sensors J 2007, 7, 1118–1129.
Piliarik, M.; Homola, J.; Manikova, Z.; ？tyroky, J. Surface Plasmon Resonance Sensor Based on a Single-Mode Polarization-Maintaining Optical Fiber. Sens. Actuat. B Chem 2003, 90, 236–242.
[4]
Lomer, M.; Arrue, J.; Jauregui, C.; Aiestaran, P.; Zubia, J.; Lopez-Higuera, J.M. Lateral Polishing of Bends in Plastic Optical Fibres Applied to a Multipoint Liquid-Level Measurement Sensor. Sens. Actuat. A Phys 2007, 137, 68–73.
[5]
Mu？oz-Berti, V.M.; López-Pérez, A.C.; Alén, B.; Costa-Kr？merm, J.L.; García-Martín, A.; Lomer, M.; López-Higuera, J.M. Low Cost Plastic Optical Fiber Sensor Based on Surface Plasmon Resonance. Proc. SPIE 2010, 7653, 765327.
[6]
Kanso, M.; Cuenot, S.; Louarn, G. Sensitivity of Optical Fiber Sensor Based on Surface Plasmon Resonance: Modeling and Experiments. Plasmonics 2008, 3, 49–57.
[7]
Dwivedi, Y.S.; Sharma, A.K.; Gupta, B.D. Influence of Design Parameters on the Performance of a SPR Based Fiber Optic Sensor. Plasmonics 2008, 3, 79–86.
[8]
Cennamo, N.; Massarotti, D.; Conte, L.; Zeni, L. SPR in Plastic Optical Fibers: A Simple Geometry for Low-Cost Biosensors. Proceedings of 4th EOS Topical Meeting on Optical Microsystems, Capri, Italy, 26–28 September 2011.
[9]
Sipe, J.E. The ATR Spectra of Multipole Surface Plasmons. Surf. Sci 1979, 84, 75–105.
[10]
Roy, D. Surface Plasmon Resonance Spectroscopy of Dielectric Coated Gold and Silver Films on Supporting Metal Layers: Reflectivity Formulas in the Kretschmann Formalism. Appl. Spectrosc 2001, 55, 1046–1052.
[11]
Iga, M.; Seki, A.; Watanabe, K. Gold Thickness Dependence of SPR-Based Hetero-Core Structured Optical Fiber Sensor. Sens. Actuat. B Chem 2005, 106, 363–368.
