SKM 2023 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 48: Ultra-fast Phenomena
HL 48.1: Talk
Friday, March 31, 2023, 09:30–09:45, POT 251
Characterizing the nonadiabatic tunneling dynamics in solid-state high harmonic generation — •Ruixin Zuo1, Xiaohong Song2, Shuai Ben2, Weifeng Yang2, and Torsten Meier1 — 1Department of Physics, Paderborn University, Warburger Str. 100, D-33098 Paderborn, Germany — 2School of Science, Hainan University, Hainan 570288, China
Tunneling is a fundamental quantum process which may result from light-matter interaction. High-harmonic radiation, as an ultrafast phenomenon initiated by the tunneling excitation, carries information about the electronic dynamics in the classically forbidden region. We introduce a quantum trajectory analysis to identify the underlying quantum dynamics governing solid-state high harmonics which improves the understanding of neighboring-atoms collisions [1]. It is revealed that properties of the electron-hole pairs when emerging in the classically allowed region like the group velocity and the relative displacement are dictated by the nonadibaticity of tunnel ionization and are crucial in determining the subsequent propagation and radiation. Furthermore, we show that the two-color high harmonic spectroscopy validates the quantum trajectory analysis and enables us to probe the tunneling dynamics in strongly driven solid-state systems.
[1] R. Zuo, A. Trautmann, G. Wang, W.-R. Hannnes, S. Yang, X. Song, T. Meier, M. Ciappina, H. T. Duc, and W. Yang, Neighboring atom collisions in solid-state high harmonic generation, Ultrafast Science 2021, 9861923 (2021).