Physics – Quantum Physics
Scientific paper
2005-07-14
Physics
Quantum Physics
4 pages, 4 figures
Scientific paper
We analyze the two-dimensional momentum distribution of electrons ionized by few-cycle laser pulses in the transition regime from multiphoton absorption to tunneling by solving the time-dependent Schr\"odinger equation and by a classical-trajectory Monte Carlo simulation with tunneling (CTMC-T). We find a complex two-dimensional interference pattern that resembles ATI rings at higher energies and displays Ramsauer-Townsend diffraction oscillations in the angular distribution near threshold. CTMC-T calculations provide a semiclassical explanation for the dominance of selected partial waves. While the present calculation pertains to hydrogen, we find surprising qualitative agreement with recent experimental data for rare gases [1].
Arbo Diego G.
Burgdörfer Joachim
Dimitriou Kostantinos I.
Persson Emil
Yoshida Shin'ichirou
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