Evanescent waves metallic nanoparticles

Solutions for the scattering of evanescent waves by a sphere were studied initially by Chew et al. in 1979 (68). Evanescent wave is generated from a dielectric/air plane interface due to total internal reflection and is scattered by a dielectric sphere. Quinten et al, on the other hand, derived the total cross section for extinction and scattering of evanescent waves by a small metal particle (69). In these studies, a particle with smaller size is placed away from the plane interface, and therefore the multiple scattering between the sphere and the plane interface is ignored. Quinten s study further supports that the extinction cross section for the extinction of p-polarized evanescent waves by a metallic nanoparticle is larger than that for s-polarized evanescent waves and plane waves. This can be attributed to the... 

Scattering of Evanescent Waves by Spherical Metallic Nanoparticles... 

Structure A is the simplest structure formed by fusion sphcing a section of a coreless fiber to two pieces of continuous multimode fibers. In this sensor, different modes propagating in the multimode fiber expand to the surface of the coreless fiber in the central region and after reflection from the coreless fiber-environment boundary, get coupled back into the second multimode fiber fused to the coreless fiber. The evanescent waves at the coreless fiber-environment boundary excite plasmon resonance is the metallic nanoparticles formed on the surface of the coreless fiber section, as shown in Figure 3 A. This structure is not very effective for sensing purposes as there are a lot of... 

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