title: Laser technology: source of coherent kiloelectronvolt X-rays.
abstract: Generating X-rays that have the properties of laser light has been a long-standing goal for experimental science. Here we describe the emission of highly collimated, spatially coherent X-rays, at a wavelength of about 1 nanometre and at photon energies extending to 1.3 kiloelectronvolts, from atoms that have been ionized by a 5-femtosecond laser pulse. This means that a laboratory source of laser-like, kiloelectronvolt X-rays, which will operate on timescales relevant to many chemical, biological and materials problems, is now within reach.
authors.affiliation: Institut für Photonik, Technische Universität Wien, 1040 Wien, Austria.
authors.forename: J
authors.initials: J
authors.lastname: Seres
authors.forename: E
authors.initials: E
authors.lastname: Seres
authors.forename: A J
authors.initials: AJ
authors.lastname: Verhoef
authors.forename: G
authors.initials: G
authors.lastname: Tempea
authors.forename: C
authors.initials: C
authors.lastname: Streli
authors.forename: P
authors.initials: P
authors.lastname: Wobrauschek
authors.forename: V
authors.initials: V
authors.lastname: Yakovlev
authors.forename: A
authors.initials: A
authors.lastname: Scrinzi
authors.forename: C
authors.initials: C
authors.lastname: Spielmann
authors.forename: F
authors.initials: F
authors.lastname: Krausz