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Prism coupling in the Kretschmann configuration is a well-known method for excitation of surface plasmon polaritons (SPP’s) in a metal film bounded from one side by a prism and from the other side by air. The analysis of the reflectance in the upper medium (prism) is based on the well-known Fresnel’s formula. Due to the fact that this formula cannot be inverted directly to give the complex dielectric...
The standard technique for surface polaritons excitation by a prism coupling in Otto configuration is applied for investigation of almost perfectly conducting (pec) metals like tantalum irradiated by a collimated He-Ne laser radiation (λ 0 = 632.8 nm). In pec metals the imaginary part of the relative dielectric permittivity (ɛ″) is quite larger than the modulus of the real part of the same quantity...
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