title: Optical properties of scandium films in the far and the extreme ultraviolet.
abstract: The optical properties of thin Sc films deposited in ultrahigh-vacuum conditions have been investigated in the 6.7-174.4-nm spectral range. We measured transmittance and multiangle reflectance in situ in the 53.6-174.4 nm spectral range and used these measurements to obtain the complex refractive index of a Sc film at every individual wavelength investigated. Transmittance measurements were made of Sc samples that were deposited over grids coated with a support C film. The transmittance and the extinction coefficient of Sc films at wavelengths shorter than 30 nm were measured ex situ. The ex situ samples were protected with an additional top C film before their removal from vacuum. To our knowledge, these are the first optical measurements of Sc films reported in the spectral ranges cited.
authors.affiliation: Instituto de Física Aplicada, Consejo Superior de Investigaciones Científicas, C/Serrano 144, 28006 Madrid, Spain. larruquert@io.cfmac.csic.es
authors.forename: Juan I
authors.initials: JI
authors.lastname: Larruquert
authors.forename: José A
authors.initials: JA
authors.lastname: Aznárez
authors.forename: José A
authors.initials: JA
authors.lastname: Méndez
authors.forename: Andrea Marco
authors.initials: AM
authors.lastname: Malvezzi
authors.forename: Luca
authors.initials: L
authors.lastname: Poletto
authors.forename: Sara
authors.initials: S
authors.lastname: Covini