Infrared optical properties of evaporated alumina films
- 1 August 1981
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 20 (15), 2742-2746
- https://doi.org/10.1364/ao.20.002742
Abstract
The dielectric function ∊ = ∊1 + i∊2 has been determined for Al2O3 films prepared by electron beam evaporation, in the 5–50-μm wavelength range. The data were extracted from spectrophotometric recordings of transmittance and reflectance by use of a novel technique. Supplementary measurements were made of the refractive index for visible and near-infrared wavelengths and of the dielectric constant at 1 MHz. Kramers-Kronig analysis was employed to check the consistency of our results for ∊1 and ∊2.Keywords
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