title: Using compound kinoform hard-x-ray lenses to exceed the critical angle limit.
abstract: We have fabricated and tested a compound lens consisting of an array of four kinoform lenses for hard x-ray photons of 11.3 keV. Our data demonstrate that it is possible to exceed the critical angle limit by using multiple lenses, while retaining lens function, and this suggests a route to practical focusing optics for hard x-ray photons with nanometer scale resolution and below.
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11973, USA. kenne@bnl.gov
authors.forename: K
authors.initials: K
authors.lastname: Evans-Lutterodt
authors.forename: A
authors.initials: A
authors.lastname: Stein
authors.forename: J M
authors.initials: JM
authors.lastname: Ablett
authors.forename: N
authors.initials: N
authors.lastname: Bozovic
authors.forename: A
authors.initials: A
authors.lastname: Taylor
authors.forename: D M
authors.initials: DM
authors.lastname: Tennant