title: Double slit interferometry to measure the EUV refractive indices of solids using high harmonics.
abstract: Accurate values of the extreme ultraviolet (EUV) optical properties of materials are required to make EUV optics such as filters and multilayer mirrors. The optical properties of aluminum studied in this report are required, in particular, as aluminum is used as an EUV filter material. The complex refractive index of solid aluminum and the imaginary part of the refractive index of solid iron between 17 eV and 39 eV have been measured using EUV harmonics produced from an 800 nm laser focused to 10(14) Wcm(2) in an argon gas jet impinging on a double slit interferometer.
authors.affiliation: York Plasma Institute, The Department of Physics, The University of York, York, UK. law504@york.ac.uk
authors.forename: Lucy A
authors.initials: LA
authors.lastname: Wilson
authors.forename: Andrew K
authors.initials: AK
authors.lastname: Rossall
authors.forename: Erik
authors.initials: E
authors.lastname: Wagenaars
authors.forename: Cephise M
authors.initials: CM
authors.lastname: Cacho
authors.forename: Emma
authors.initials: E
authors.lastname: Springate
authors.forename: I C Edmond
authors.initials: IC
authors.lastname: Turcu
authors.forename: Greg J
authors.initials: GJ
authors.lastname: Tallents