Adsorption of a evanescent waves

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    Adsorption Waves
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SUMMARY

The discussion focuses on the impact of highly adsorbing materials on the reflectivity of light in a total reflection setup involving evanescent waves. It is established that if the first medium has zero adsorption and the second medium is highly adsorbing, the reflectivity of the surface will indeed change. The analysis requires the application of Fresnel Coefficients, which account for the complex permittivity (ε) or permeability (μ) of the lossy material involved.

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  • Understanding of total internal reflection principles
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  • Basic concepts of complex permittivity and permeability
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maurice74
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The question is:
in a total reflection setup, we have an evanescent waves created in the second medium, under the separation surface. If this medium is highly adsorbing, would then affect the reflected light ?
Let's say the first medium has adsorption zero, while the second is highly adsorbing. Would that change the reflectivity of the surface ?
 
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Yes. Write out the Fresnel Coefficients for the problem. A lossy material has a complex ##\epsilon## or ##\mu##
 

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