title: Optical constants of very thin gold films in the soft x-ray region.
abstract: The optical constants, delta = 1 - n and k, of very thin gold films have been determined from the reflectance data obtained in the soft x-ray region of 60-900 eV. The gold films were prepared to various thicknesses, d = 49 - 270 A, by ion beam sputtering (IBS) and electron beam evaporation (EB). A plane parallel slab model with due considerations for the surface and the interface roughness was employed to analyze the reflectance data by least-squares curve fitting. The optical constants determined for the IBS samples definitely show their dependence on the film thickness. It is also found that delta of the 201-A thick IBS film is smaller by 10% than that of the EB film of 212 A thick.
authors.forename: M
authors.initials: M
authors.lastname: Yanagihara
authors.forename: J
authors.initials: J
authors.lastname: Cao
authors.forename: M
authors.initials: M
authors.lastname: Yamamoto
authors.forename: A
authors.initials: A
authors.lastname: Arai
authors.forename: S
authors.initials: S
authors.lastname: Nakayama
authors.forename: T
authors.initials: T
authors.lastname: Mizuide
authors.forename: T
authors.initials: T
authors.lastname: Namioka