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Title: High-order harmonic generation in the presence of a resonance

Abstract

We investigate high-order harmonic generation from laser-irradiated systems that support a shape resonance. From the numerical solution of the time-dependent Schroedinger equation, we calculate the harmonic spectra and the time-frequency analysis of the harmonic intensity and phase. The analysis reveals the separate contributions of the short and long trajectories as well as the resonance. A range of harmonics is strongly enhanced by the presence of the resonance irrespective of the pulse length. The signature of the resonance remains significant after coherent summation over intensities as a simple method to simulate macroscopic effects. The time-frequency analysis supports the recently proposed four-step mechanism of the enhanced harmonic generation process.

Authors:
 [1];  [2];  [1]
  1. Institut fuer Theoretische Physik and Centre for Quantum Engineering and Space-Time Research (QUEST), Leibniz Universitaet Hannover, Appelstrasse 2, D-30167 Hannover (Germany)
  2. (Germany)
Publication Date:
OSTI Identifier:
22051341
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 1; 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; FREQUENCY ANALYSIS; HARMONIC GENERATION; HARMONICS; MESONS; NUMERICAL SOLUTION; RESONANCE; SCHROEDINGER EQUATION; SPECTRA; TIME DEPENDENCE

Citation Formats

Tudorovskaya, Maria, Institut fuer Physik, Universitaet Kassel, Heinrich-Plett-Strasse 40, D-31432 Kassel, and Lein, Manfred. High-order harmonic generation in the presence of a resonance. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.013430.
Tudorovskaya, Maria, Institut fuer Physik, Universitaet Kassel, Heinrich-Plett-Strasse 40, D-31432 Kassel, & Lein, Manfred. High-order harmonic generation in the presence of a resonance. United States. doi:10.1103/PHYSREVA.84.013430.
Tudorovskaya, Maria, Institut fuer Physik, Universitaet Kassel, Heinrich-Plett-Strasse 40, D-31432 Kassel, and Lein, Manfred. Fri . "High-order harmonic generation in the presence of a resonance". United States. doi:10.1103/PHYSREVA.84.013430.
@article{osti_22051341,
title = {High-order harmonic generation in the presence of a resonance},
author = {Tudorovskaya, Maria and Institut fuer Physik, Universitaet Kassel, Heinrich-Plett-Strasse 40, D-31432 Kassel and Lein, Manfred},
abstractNote = {We investigate high-order harmonic generation from laser-irradiated systems that support a shape resonance. From the numerical solution of the time-dependent Schroedinger equation, we calculate the harmonic spectra and the time-frequency analysis of the harmonic intensity and phase. The analysis reveals the separate contributions of the short and long trajectories as well as the resonance. A range of harmonics is strongly enhanced by the presence of the resonance irrespective of the pulse length. The signature of the resonance remains significant after coherent summation over intensities as a simple method to simulate macroscopic effects. The time-frequency analysis supports the recently proposed four-step mechanism of the enhanced harmonic generation process.},
doi = {10.1103/PHYSREVA.84.013430},
journal = {Physical Review. A},
issn = {1050-2947},
number = 1,
volume = 84,
place = {United States},
year = {2011},
month = {7}
}