Hannover 2013 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 33: Interaction with strong or short laser pulses III

A 33.4: Vortrag

Donnerstag, 21. März 2013, 11:45–12:00, B 302

Near-zero energy electron emission in strong field ionization at long wavelength — •Camus Nicolas¹, Dura Judith², Biegert Jens², Britz Alexander², Thai Alexandre², Hemmer Michael², Baudish Matthias², Ullrich Joachim^1,3, Senftleben Arne¹, and Moshammer Robert¹ — ¹Max-Planck-Institut für Kernphysik, Heidelberg, Germany — ²ICFO-Institut de Ciences Fotoniques, 08860 Barcelona, Spain — ³Physikalisch-Technische Bundesanstalt, Braunschweig, Germany

The discovery of surprisingly high yields of low energy electrons in single ionization of atoms and molecules with intense near infra-red laser pulses [1] triggered theoretical [2-4] as well as experimental activities [5,6] in order to complete our understanding of the photo-ionization process. The important role of electron rescattering in the Coulomb potential is a common ingredient of all existing explanations, but a comprehensive description is still missing. Here we report on high-resolution measurements with a Reaction Microscope on ionization of atoms and small molecules using few-cycle long wavelength (3100 nm) laser pulses at high intensity, well in the tunneling regime. Results will be presented and discussed in the framework of already existing measurements and available theoretical models.

[1] Blaga et al, Nature Physics, 2009, 5, 335-338 [2] Liu et al Phys. Rev. Lett., 2010, 105, 113003 [3] Yan et al Phys. Rev. Lett., 2010, 105, 253002 [4] Kastner et al Phys. Rev. Lett., 2012, 108, 033201 [5] Quan, W. et al Phys. Rev. Lett., 2009, 103, 093001 [6] Wu et al Phys. Rev. Lett., 2012, 109, 043001