Above-threshold ionization of diatomic molecules by few-cycle laser pulses

Journal Article · Sat Oct 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.043426· OSTI ID:22095383

Gazibegovic-Busuladzic, A. ^[1]; Hasovic, E. ^[1]; Busuladzic, M. ^[2]; Milosevic, D. B. ^[1]; Kelkensberg, F.; Siu, W. K. ^[3]; Vrakking, M. J. J. ^[4]; Lepine, F. ^[5]; CNRS, ^[6]; Sansone, G.; Nisoli, M. ^[7]; Znakovskaya, I. ^[8]; Kling, M. F. ^[8]

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1. Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, 71000 Sarajevo (Bosnia and Herzegowina)
2. Medical Faculty, University of Sarajevo, Cekalusa 90, 71000 Sarajevo (Bosnia and Herzegowina)
3. FOM-Institute AMOLF, Science park 104, NL-1098 XG Amsterdam (Netherlands)
4. Max-Born-Institut, Max-Born-Str. 2a, D-12489 Berlin (Germany)
5. Universite Lyon 1 (France)
6. France
7. Politecnico di Milano, Department of Physics, National Research Council of Italy, Institute of Photonics and Nanotechnologies (CNR-IFN), Piazza L. da Vinci 32, I-20133, Milano (Italy)
8. Max-Planck-Institut fuer Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching (Germany)

Above-threshold ionization of diatomic molecules by infrared carrier-envelope phase (CEP) stable few-cycle laser pulses is analyzed both experimentally and theoretically. The theoretical approach is based on the recently developed molecular improved strong-field approximation (ISFA), generalized to few-cycle pulses. Instead of using the first Born approximation, the rescattering matrix element in the ISFA is now calculated exactly. This modification leads to the appearance of characteristic minima in the differential cross section as a function of the scattering angle. Experimental angle-resolved photoelectron spectra of N{sub 2} and O{sub 2} molecules are obtained using the velocity map imaging technique. A relatively good agreement of experimental and simulated angle-resolved spectra, CEP-dependent asymmetry maps, and extracted electron-molecular ion elastic scattering differential cross sections is obtained.

• OSTI ID: 22095383
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 84; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ASYMMETRY
BORN APPROXIMATION
COMPUTERIZED SIMULATION
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
ELECTRONS
IONIZATION
LASERS
MATRIX ELEMENTS
MOLECULAR IONS
MOLECULES
NITROGEN
OXYGEN
PHOTOELECTRON SPECTROSCOPY
PULSES
RESCATTERING
SPECTRA