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Title: Monitoring attosecond dynamics of coherent electron-nuclear wave packets by molecular high-order-harmonic generation

Abstract

A pump-probe scheme for preparing and monitoring electron-nuclear motion in a dissociative coherent electron-nuclear wave packet is explored from numerical solutions of a non-Born-Oppenheimer time-dependent Schroedinger equation. A mid-ir intense few-cycle probe pulse is used to generate molecular high-order-harmonic generation (MHOHG) from a coherent superposition of two or more dissociative coherent electronic-nuclear wave packets, prepared by a femtosecond uv pump pulse. Varying the time delay between the intense ir probe pulse and the uv pump pulse by a few hundreds of attoseconds, the MHOHG signal intensity is shown to vary by orders of magnitude, thus showing the high sensitivity to electron-nuclear dynamics in coherent electron-nuclear wave packets. We relate this high sensitivity of MHOHG spectra to opposing electron velocities (fluxes) in the electron wave packets of the recombining (recolliding) ionized electron and of the bound electron in the initial coherent superposition of two electronic states.

Authors:
 [1]; ;  [1]
  1. Laboratoire de Chimie Theorique, Faculte des Sciences, Universite de Sherbrooke, Sherbrooke, Quebec, J1K 2R1 (Canada)
Publication Date:
OSTI Identifier:
22068460
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 2; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ELECTRONS; HARMONIC GENERATION; NUMERICAL SOLUTION; PULSES; SCHROEDINGER EQUATION; TIME DEPENDENCE; WAVE PACKETS

Citation Formats

Bredtmann, Timm, Institut fuer Chemie und Biochemie, Freie Universitaet Berlin, Takustrasse 3, D-14195 Berlin, Chelkowski, Szczepan, and Bandrauk, Andre D. Monitoring attosecond dynamics of coherent electron-nuclear wave packets by molecular high-order-harmonic generation. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.021401.
Bredtmann, Timm, Institut fuer Chemie und Biochemie, Freie Universitaet Berlin, Takustrasse 3, D-14195 Berlin, Chelkowski, Szczepan, & Bandrauk, Andre D. Monitoring attosecond dynamics of coherent electron-nuclear wave packets by molecular high-order-harmonic generation. United States. doi:10.1103/PHYSREVA.84.021401.
Bredtmann, Timm, Institut fuer Chemie und Biochemie, Freie Universitaet Berlin, Takustrasse 3, D-14195 Berlin, Chelkowski, Szczepan, and Bandrauk, Andre D. Mon . "Monitoring attosecond dynamics of coherent electron-nuclear wave packets by molecular high-order-harmonic generation". United States. doi:10.1103/PHYSREVA.84.021401.
@article{osti_22068460,
title = {Monitoring attosecond dynamics of coherent electron-nuclear wave packets by molecular high-order-harmonic generation},
author = {Bredtmann, Timm and Institut fuer Chemie und Biochemie, Freie Universitaet Berlin, Takustrasse 3, D-14195 Berlin and Chelkowski, Szczepan and Bandrauk, Andre D},
abstractNote = {A pump-probe scheme for preparing and monitoring electron-nuclear motion in a dissociative coherent electron-nuclear wave packet is explored from numerical solutions of a non-Born-Oppenheimer time-dependent Schroedinger equation. A mid-ir intense few-cycle probe pulse is used to generate molecular high-order-harmonic generation (MHOHG) from a coherent superposition of two or more dissociative coherent electronic-nuclear wave packets, prepared by a femtosecond uv pump pulse. Varying the time delay between the intense ir probe pulse and the uv pump pulse by a few hundreds of attoseconds, the MHOHG signal intensity is shown to vary by orders of magnitude, thus showing the high sensitivity to electron-nuclear dynamics in coherent electron-nuclear wave packets. We relate this high sensitivity of MHOHG spectra to opposing electron velocities (fluxes) in the electron wave packets of the recombining (recolliding) ionized electron and of the bound electron in the initial coherent superposition of two electronic states.},
doi = {10.1103/PHYSREVA.84.021401},
journal = {Physical Review. A},
issn = {1050-2947},
number = 2,
volume = 84,
place = {United States},
year = {2011},
month = {8}
}