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Improved performance of SPR sensors by a chemical etching of tapered optical fibers |
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| Authors: | Natalia Díaz HerreraÓscar Esteban María-Cruz NavarreteAgustín González-Cano Elena Benito-PeñaGuillermo Orellana |
| Institution: | a Optics Department, School of Optics, Complutense University of Madrid, Arcos de Jalón 118, 28037, Madrid, Spain b Electronics Department, Alcala University, Polytechnic School, 28871 Alcalá de Henares, Madrid, Spain c Optics Department, Faculty of Physics, Complutense University of Madrid, 28040 Madrid, Spain d Department of Organic Chemistry, Faculty of Chemistry, Complutense University of Madrid, 28040 Madrid, Spain |
| Abstract: | We present the results of a chemical attack on the optical fiber surface previous to the deposition of the double layer (metal plus dielectric) in Double-layer uniform-waist tapered fibers (DLUWTs) used for the development of SPR sensors. It is shown how this simple chemical treatment increases the roughness of the surface and permits improvement of the stability of the deposits and the general performance of the sensors. The obtained devices are robust and very compact, their sensitivity is good and repeatability of the measurements is remarkably increased. The procedure can be useful for any fiber-optic sensor. |
| Keywords: | Surface plasmon resonance Tapered optical fibers Hydrofluoric acid Fiber-optic sensors |
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