Mainz 2017 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 8: XUV/X-ray spectroscopy II

A 8.6: Vortrag

Montag, 6. März 2017, 18:45–19:00, N 2

Sub-envelope dynamics of slow electrons from non-adiabatic transitions — •Qi-Cheng Ning, Ulf Saalmann, and Jan-Michael Rost — Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Straße 38, 01187 Dresden, Germany

Ultra-short, intense and high-frequency laser pulses are able to release a bunch of slow electrons from atomic systems as the consequence of non-adiabatic transitions [1-3]. We find the formations of slow electrons peaks possess quite crucial dynamic origins which are intrinsic and have never been recognized. The previous observed peaks [1-3] should be comprehended as coherently combined outcomes of the continuum wavepackets launched by left hand side and right hand side of the laser envelope. The electron energy spectra exhibit oscillatory features and they are attributed to Stückelberg interferences, to achieve a profound understanding of the dynamic processes, we put forward numerical experiments using one single laser pulse which can be regarded as a pump-probe setup to reconstruct the quantum phases differences between wavepackets. As one other aspect of envelope dynamics, continuum-continuum non-adiabatic transitions are found appreciable to reshuffle distributions of electron energy spectra and they function oppositely at two sides of the pulse due to inverse slopes of the laser envelopes.

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