High-order-harmonic generation driven by metal nanotip photoemission: Theory and simulations

Quantitative rescattering theory for high-order harmonic generation from molecules

Anh-Thu Le, R. R. Lucchese, S. Tonzani, T. Morishita, and C. D. Lin Department of Physics, Cardwell Hall, Kansas State University, Manhattan, Kansas 66506, USA Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, USA Nature Publishing Group, 4 Crinan Street, London N1 9XW, United Kingdom Department of Applied Physics and Chemistry, University of Electro-Communicatio...

Potential barrier effects in high-order harmonic generation by transition-metal ions

Group velocity matching in high-order harmonic generation driven by mid-infrared lasers

Weanalyze the role of group-velocitymatching (GVM) in themacroscopic build up of the highharmonic signal generated in gas targets at high pressures. A definition of thewalk-off length, associatedwithGVM, in the non-perturbative intensity regime of high-harmonic generation is given. Semiclassical predictions based on this definition are in excellent agreementwith full quantum simulations.We demo...

Sub-cycle ionization dynamics revealed by trajectory resolved, elliptically-driven high-order harmonic generation

The sub-cycle dynamics of electrons driven by strong laser fields is central to the emerging field of attosecond science. We demonstrate how the dynamics can be probed through high-order harmonic generation, where different trajectories leading to the same harmonic order are initiated at different times, thereby probing different field strengths. We find large differences between the trajectori...

Efficient photoemission and ionization of He+ by a combined fundamental laser and high-order harmonic pulse

We theoretically study the behavior of He+ exposed simultaneously to an ultrashort intense Ti:sapphire laser and its 27th or 13th harmonic pulses, by solving the time-dependent Schrödinger equation using the alternating direction implicit method. This system is chosen as an interesting application of state-of-the-art high-order harmonic sources. Our results show that the simple hydrogenlike sys...