title: 3/2 harmonic generation by femtosecond laser pulses in steep-gradient plasmas.
abstract: The onset of an electron parametric instability and 3/2 harmonic generation in variable-scale-length plasmas on solid surfaces using femtosecond pulses is observed. With the intensity approaching 10(18) W/cm(2), the instability threshold is already reached at plasma scale lengths of the order of the laser wavelength. A well-collimated harmonic emission with unusually broad spectrum is obtained.
authors.affiliation: Institut für Laser-und Plasmaphysik, Universität Essen-Duisburg, D-45117 Essen, Germany. tar@iep.physik.uni-essen.de
authors.forename: A
authors.initials: A
authors.lastname: Tarasevitch
authors.forename: C
authors.initials: C
authors.lastname: Dietrich
authors.forename: C
authors.initials: C
authors.lastname: Blome
authors.forename: K
authors.initials: K
authors.lastname: Sokolowski-Tinten
authors.forename: D
authors.initials: D
authors.lastname: von der Linde