Heidelberg 2015 – wissenschaftliches Programm
A 7.6: Poster
Montag, 23. März 2015, 17:00–19:00, C/Foyer
Low-energy electrons in strong high frequency pulses — •Qi-Cheng Ning, Koudai Toyota, Ulf Saalmann, and Jan-Michael Rost — Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Straße 38, 01187 Dresden, Germany
In the tunneling ionization regime atoms and molecules, singly ionized by strong mid-infrared laser pulse, produce an unexpected low-energy structure , which can be explained by classical soft recollisions .
Surprisingly, low-energy electrons have been found numerically also in a higher-frequency regime, where they originate from a pure quantum effect . Its physical picture can now be depicted by the non-adiabatic evolution of the system in a short pulse with duration comparable to the characteristic time scale of the bound electron . We study this case also in a two-electron system. There a low-energy peak structure in the doubly-ionized electron spectrum has been confirmed and studied in terms of electron correlation.
 C. I. Balga et al., Nat. Phys. 5, 335 (2009).  A. Kastner, U. Saalmann, and J. M. Rost, Phys. Rev. Lett. 108, 033201 (2012).  K, Toyota, O. I. Tolstikhin, T. Morishita, and S. Watanabe, Phys. Rev. Lett. 103, 153003 (2009).  K. Koudai, U. Saalmann, and J. M. Rost, arXiv.1408.4541.