title: Alignment dependent enhancement of the photoelectron cutoff for multiphoton ionization of molecules.
abstract: The multiphoton ionization rate of molecules depends on the alignment of the molecular axis with respect to the ionizing laser polarization. By studying molecular frame photoelectron angular distributions from N(2), O(2), and benzene, we illustrate how the angle-dependent ionization rate affects the photoelectron cutoff energy. We find alignment can enhance the high energy cutoff of the photoelectron spectrum when probing along a nodal plane or when ionization is otherwise suppressed. This is supported by calculations using a tunneling model with a single ion state.
authors.affiliation: JASLab, University of Ottawa and National Research Council, 100 Sussex Drive, Ottawa, Canada K1A 0R6.
authors.forename: C T L
authors.initials: CT
authors.lastname: Smeenk
authors.affiliation: Department of Electrical and Computer Engineering, University of New Mexico, Albuquerque, New Mexico 87131, USA.
authors.forename: L
authors.initials: L
authors.lastname: Arissian
authors.affiliation: Department of Physics, Texas A & M University, College Station 77843, Texas, USA.
authors.forename: A V
authors.initials: AV
authors.lastname: Sokolov
authors.affiliation: JASLab, University of Ottawa and National Research Council, 100 Sussex Drive, Ottawa, Canada K1A 0R6.
authors.forename: M
authors.initials: M
authors.lastname: Spanner
authors.affiliation: JASLab, University of Ottawa and National Research Council, 100 Sussex Drive, Ottawa, Canada K1A 0R6 and Department of Physics, Texas A & M University, College Station 77843, Texas, USA.
authors.forename: K F
authors.initials: KF
authors.lastname: Lee
authors.affiliation: JASLab, University of Ottawa and National Research Council, 100 Sussex Drive, Ottawa, Canada K1A 0R6.
authors.forename: A
authors.initials: A
authors.lastname: Staudte
authors.affiliation: JASLab, University of Ottawa and National Research Council, 100 Sussex Drive, Ottawa, Canada K1A 0R6.
authors.forename: D M
authors.initials: DM
authors.lastname: Villeneuve
authors.affiliation: JASLab, University of Ottawa and National Research Council, 100 Sussex Drive, Ottawa, Canada K1A 0R6.
authors.forename: P B
authors.initials: PB
authors.lastname: Corkum