title: Wavelength dependence of the suppressed ionization of molecules in strong laser fields.
abstract: We study ionization of molecules by an intense laser field over a broad wavelength regime, ranging from 0.8 to 1.5 μm experimentally and from 0.6 to 10 μm theoretically. A reaction microscope is combined with an optical parametric amplifier to achieve ionization yields in the near-infrared wavelength regime. Calculations are done using the strong-field S-matrix theory and agreement is found between experiment and theory, showing that ionization of many molecules is suppressed compared to the ionization of atoms with identical ionization potentials at near-infrared wavelengths at around 0.8 μm, but not at longest wavelengths (10 μm). This is due to interference effects in the electron emission that are effective at low photoelectron energies but tend to average out at higher energies. We observe the transition between suppression and nonsuppression of molecular ionization in the near-infrared wavelength regime (1-5 μm).
authors: ICFO-Institut de Ciencies Fotoniques, Av. Carl Friedrich Gauss 3, 08860 Castelldefels (Barcelona), Spain. judith.dura@icfo.es
authors: J
authors: J
authors: Durá
authors: A
authors: A
authors: Grün
authors: P K
authors: PK
authors: Bates
authors: S M
authors: SM
authors: Teichmann
authors: T
authors: T
authors: Ergler
authors: A
authors: A
authors: Senftleben
authors: T
authors: T
authors: Pflüger
authors: C D
authors: CD
authors: Schröter
authors: R
authors: R
authors: Moshammer
authors: J
authors: J
authors: Ullrich
authors: A
authors: A
authors: Jaroń-Becker
authors: A
authors: A
authors: Becker
authors: J
authors: J
authors: Biegert