By Leiva Casemiro Oliveira, Antonio Marcus Nogueira Lima, Carsten Thirstrup, Helmut Franz Neff

This booklet addresses the $64000 actual phenomenon of floor Plasmon Resonance or floor Plasmon Polaritons in skinny steel movies, a phenomenon that's exploited within the layout of a giant number of physico-chemical optical sensors. during this therapy, an important fabrics facets for layout and optimization of SPR sensors are investigated and defined intimately. The textual content covers the choice of nanometer skinny steel movies, starting from free-electron to the platinum style conductors, in addition to their mixture with a wide number of dielectric substrate fabrics, and linked person layer and opto-geometric preparations. additionally, as-yet not often explored SPR gains of chosen metal–metal and metal–dielectric great lattices are integrated during this record. An in-depth multilayer Fresnel evaluate presents the mathematical device for this optical research, which differently is predicated exclusively on experimentally made up our minds electro-optical fabrics parameters.

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Extra resources for Surface Plasmon Resonance Sensors: A Materials Guide to Design and Optimization

Example text

9. In this mode, the highest achievable sensor responsivity RAIM (θ ) is not much different from the short range SPP, depicted in Fig. 5, except the wavelength shift to 670 nm. 2 Localized Plasmons in Colloidal Al-Particles (LSPR-Mode) The optical absorption characteristic of colloidal Al-particles with 45 nm diameter, immersed into an aqueous solution with varying refractive index nan as function of wavelength, is depicted in Fig. 10. Upper right insets reveal spectral reso- Fig. 10 Oscillating optical absorption for Al-particles of 45 nm diameter, calculated as function of wavelength for different refractive index (RIU) values of the surrounding solution.

39. Substrate is BK7, incident wavelengths are 708 nm, insets show line broadening Δθres (nan ). Resonance displacements θres (nan ) and SP-responsivity RAIM (nan ) for four wavelength, depicted in three left figures Fig. 6 WIM-reflectance at the SP-resonance for different Cu-film thickness values of 10, 30, 40, 70 and 90 nm Fig. 7 AIM-reflectance at the SP-resonance for different Cu-film thickness values of 10, 30, 40, 70 and 90 nm is high up to 150◦ /RIU, and increases with decreasing wavelength, whilst the line broadening parameter Δθres (nan ) behaves opposite.

0 nm. The SP-resonance is only weakly affected through its presence. 9 eV. Related spectral features of the reflectance R(λ) in the WIM are shown in Fig. 2 for the substrate materials under consideration. Except Sapphire and MgF2 , all other substrates exhibit a distinct SP-resonance and are suited for SP-sensing applications. For LiF, the resonance is located at rather long wavelength and high angle. The reflectance under AIM conditions is shown in Fig. 3, indicating that particularly the MgF2 substrate is unsuited for SP sensing applications.

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