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Abstract
In this paper, a theoretical investigation for the performance a tapered fiber optic sensor based on surface plasmon resonance (SPR) is proposed. The tapered fiber optic sensor is considered for three different taper profiles, namely, linear, parabolic, and exponential-linear. The tapered fiber optic sensor is coated with thin nanoparticle metallic films. The nanoparticle metallic film consists of spherical metallic nanoparticles embedded in a host material. The performance has been analyzed in terms of sensitivity and absorption of the sensor. It is shown that sensitivity and absorption of sensors depends on parameters such as taper ratio, taper profile, nanoparticle film thickness, nanoparticle radius, sensing region length, fiber core diameter, and concentration of sensing layer.
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