skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: High-order harmonic generation in the presence of a static electric field

Abstract

We consider high-order harmonic generation by a linearly polarized laser field and a parallel static electric field. We first develop a modified saddle-point method which enables a quantitative analysis of the harmonic spectra even in the presence of Coulomb singularities. We introduce a classification of the saddle-point solutions and show that, in the presence of a static electric field which breaks the inversion symmetry, an additional classification number has to be introduced and that the usual saddle-point approximation and the uniform approximation in the case of the coalescing saddle points have to be modified. The theory developed offers a simple and accurate explanation of the static-field-induced multiplateau structure of the harmonic spectra. The longer quantum orbits are responsible for a long extension of the harmonic plateau, while the larger initial electron velocities are the reason of lower harmonic emission rates.

Authors:
 [1];  [1]
  1. Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, 71000 Sarajevo (Bosnia and Herzegowina)
Publication Date:
OSTI Identifier:
20718576
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 72; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevA.72.033407; (c) 2005 The American Physical Society; 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; ELECTRIC FIELDS; ELECTRONS; EMISSION; HARMONIC GENERATION; LASER RADIATION; MATHEMATICAL SOLUTIONS; OPTICS; PHOTON-ATOM COLLISIONS; POLARIZATION; QUANTUM MECHANICS; SADDLE-POINT METHOD; SINGULARITY; SYMMETRY; VISIBLE RADIATION

Citation Formats

Odzak, S, Milosevic, D B, and Max-Born-Institut, Max-Born-Strasse 2a, 12489 Berlin. High-order harmonic generation in the presence of a static electric field. United States: N. p., 2005. Web. doi:10.1103/PhysRevA.72.033407.
Odzak, S, Milosevic, D B, & Max-Born-Institut, Max-Born-Strasse 2a, 12489 Berlin. High-order harmonic generation in the presence of a static electric field. United States. https://doi.org/10.1103/PhysRevA.72.033407
Odzak, S, Milosevic, D B, and Max-Born-Institut, Max-Born-Strasse 2a, 12489 Berlin. 2005. "High-order harmonic generation in the presence of a static electric field". United States. https://doi.org/10.1103/PhysRevA.72.033407.
@article{osti_20718576,
title = {High-order harmonic generation in the presence of a static electric field},
author = {Odzak, S and Milosevic, D B and Max-Born-Institut, Max-Born-Strasse 2a, 12489 Berlin},
abstractNote = {We consider high-order harmonic generation by a linearly polarized laser field and a parallel static electric field. We first develop a modified saddle-point method which enables a quantitative analysis of the harmonic spectra even in the presence of Coulomb singularities. We introduce a classification of the saddle-point solutions and show that, in the presence of a static electric field which breaks the inversion symmetry, an additional classification number has to be introduced and that the usual saddle-point approximation and the uniform approximation in the case of the coalescing saddle points have to be modified. The theory developed offers a simple and accurate explanation of the static-field-induced multiplateau structure of the harmonic spectra. The longer quantum orbits are responsible for a long extension of the harmonic plateau, while the larger initial electron velocities are the reason of lower harmonic emission rates.},
doi = {10.1103/PhysRevA.72.033407},
url = {https://www.osti.gov/biblio/20718576}, journal = {Physical Review. A},
issn = {1050-2947},
number = 3,
volume = 72,
place = {United States},
year = {Thu Sep 15 00:00:00 EDT 2005},
month = {Thu Sep 15 00:00:00 EDT 2005}
}