title: Polarization state of high-order harmonic emission from aligned molecules.
abstract: High harmonic emission in isotropic gases is polarized in the same direction as the incident laser polarization. Laser-induced molecular alignment allows us to break the symmetry of the gas medium. By using aligned molecules in high harmonic generation experiments, we show that the polarization of the extreme ultraviolet emission depends strongly on the molecular alignment and the orbital structure. Polarization measurements give insight into the molecular orbital symmetry. Furthermore, molecular alignment will allow us to produce attosecond pulses with time-dependent polarization.
authors.affiliation: National Research Council Canada, Ottawa, Ontario, K1A 0R6, Canada.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Levesque
authors.forename: Yann
authors.initials: Y
authors.lastname: Mairesse
authors.forename: Nirit
authors.initials: N
authors.lastname: Dudovich
authors.forename: Henri
authors.initials: H
authors.lastname: Pépin
authors.forename: Jean-Claude
authors.initials: JC
authors.lastname: Kieffer
authors.forename: P B
authors.initials: PB
authors.lastname: Corkum
authors.forename: D M
authors.initials: DM
authors.lastname: Villeneuve