Attenuated Total Reflection Spectra of the Aluminum and Silver Bilayer

概要

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In a previous publication written by Lang and Fukui, the static electronic charge densities that appear in the immediate vicinity of the Al-Ag and Ag-air interfaces in order to screen surface effects (surface regions referred to as "selvedges") were assumed to emit supplementary electromagnetic fields when polarised by an incoming light wave. From the calculations, it was predicted that a new structure due to the Ag-air selvedge should appear in the reflection spectra at wavelengths in the 330-350 nm interval. In the present paper, the experimental attenuated total reflection (ATR) frequency scan spectra obtained for various Al-Ag bilayers deposited on prisms in an ultra-high vacuum environment are presented. The expected structure was indeed visible in the spectra of samples that had a thicker silver layer. The experimental results were generally reproducible by using simple Fresnel optics, bulk dielectric constant models and the derived selvedge theory.
社団法人日本物理学会の論文
1994-07-15