Effective boundary conditions in optics of thin surface overlayers

Narrow surface overlayers contribute significantly to optical spectra. Effective boundary conditions are derived which generalize the usual boundary conditions of crystal optics and include corrections to them up to the order (kd)2, where k is the wave vector, and d is the layer width. Electromagnet...

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Bibliographic Details
Published in:Journal of applied physics 1996-04, Vol.79 (8), p.4306-4311
Main Author: Rashba, Emmanuel I.
Format: Article
Language:English
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Summary:Narrow surface overlayers contribute significantly to optical spectra. Effective boundary conditions are derived which generalize the usual boundary conditions of crystal optics and include corrections to them up to the order (kd)2, where k is the wave vector, and d is the layer width. Electromagnetic response functions of a surface layer as well as a bulk dielectric function enter as parameters into these boundary conditions. Equations are presented which relate parameters of the reflected waves and their angular dependences to the surface response functions. These equations indicate that the spectral shapes of those features in reflection spectra which originate from the surface absorption depend critically on the bulk dielectric function. The proposed formalism can be used for reconstructing surface response functions from experimental data and applied for investigating surface layers, surface-controlled ordering effects, etc.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.361799