Abstract
The optical functions ${\ensuremath{\epsilon}}_{1}$, ${\ensuremath{\epsilon}}_{2}$, $\ensuremath{\alpha}$, and $\ensuremath{-}\mathrm{Im}(\frac{1}{\ensuremath{\epsilon}})$ have been deduced from reflectance data on electron-gun-evaporated Pt samples. They were obtained by two different methods: (1) the Kramers-Kroning analysis of the normal-incidence reflectance data, and (2) the analysis of reflectance at two different incident angles. The absorption coefficient $\ensuremath{\alpha}$ shows small peaks at $h\ensuremath{\nu}=0.4, 7.7, \mathrm{and} 10.5$ eV, and a broad peak centered about 4 eV. The imaginary part of the dielectric function, ${\ensuremath{\epsilon}}_{2}$, has structure at $h\ensuremath{\nu}=6.5$ and about 11 eV.
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