title: Precision in the ellipsometric determination of the optical constants of very thin films.
abstract: The possibilities of obtaining the optical constants of very thin films from ellipsometric measurements are analyzed with the help of the approximate Drude formulas. The influence of ellipsometric errors on the determination of the optical constants of thin films is examined. It is shown that the accuracy is extremely small when the dielectric constant epsilon of the thin film is equal to the refractive index of the substrate [equation].
authors.forename: G
authors.initials: G
authors.lastname: Vuye
authors.forename: T
authors.initials: T
authors.lastname: López-Ríos