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

Title: Dependence upon the molecular and atomic ground state of higher-order harmonic generation in the few-optical-cycle regime

Abstract

High-order harmonic generation from molecules (O{sub 2}, N{sub 2}, H{sub 2}, and CO{sub 2}) and atoms (Xe, Ar, and Kr) has been studied in the few optical cycle domain. Two laser peak intensities; 2x10{sup 14} and 6x10{sup 14} W cm{sup -2}, were compared. At the lower intensity spectra were approximately the same for molecules and atoms with the same ionization potential, at higher laser intensity the cutoff of O{sub 2} and CO{sub 2} extends far beyond the cutoff of Xe and Kr, respectively, in contrast with N{sub 2} and H{sub 2} which exhibit cutoffs very close to that of Ar. This behavior is well explained by adopting an atomlike approximation for the molecule response in the high-field regime and employing the Lewenstein's model, properly modified in order to account for the nonlinear dipole moment of a randomly oriented molecule ensemble.

Authors:
;  [1]; ; ;  [2]; ; ;  [3];  [4]; ; ; ; ;  [5]
  1. Coherentia-INFM and Dipartimento di Scienze Fisiche, Universita di Napoli 'Federico II', via Cintia, 26-80126 Naples (Italy)
  2. Blackett Laboratory, Imperial College of Science, Technology and Medicine, London SW7 2BW (United Kingdom)
  3. Laboratory for Ultraviolet and X-Ray Optical Research-INFM, DEI, Universita di Padova, Padova (Italy)
  4. INFM-Dipartimento di Fisica, Universita degli Studi, Milan (Italy)
  5. National Laboratory for Ultrafast and Ultraintense Optical Science-INFM, Dipartimento di Fisica, Politecnico, Milan (Italy)
Publication Date:
OSTI Identifier:
20650262
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 71; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevA.71.013409; (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; ARGON; ATOMS; CARBON DIOXIDE; DIPOLE MOMENTS; GROUND STATES; HARMONIC GENERATION; HYDROGEN; IONIZATION POTENTIAL; KRYPTON; LASER RADIATION; MOLECULES; NITROGEN; NONLINEAR PROBLEMS; OXYGEN; XENON

Citation Formats

Altucci, C, Velotta, R, Marangos, J P, Heesel, E, Springate, E, Pascolini, M, Poletto, L, Villoresi, P, Vozzi, C, Sansone, G, Anscombe, M, Caumes, J-P, Stagira, S, and Nisoli, M. Dependence upon the molecular and atomic ground state of higher-order harmonic generation in the few-optical-cycle regime. United States: N. p., 2005. Web. doi:10.1103/PhysRevA.71.013409.
Altucci, C, Velotta, R, Marangos, J P, Heesel, E, Springate, E, Pascolini, M, Poletto, L, Villoresi, P, Vozzi, C, Sansone, G, Anscombe, M, Caumes, J-P, Stagira, S, & Nisoli, M. Dependence upon the molecular and atomic ground state of higher-order harmonic generation in the few-optical-cycle regime. United States. https://doi.org/10.1103/PhysRevA.71.013409
Altucci, C, Velotta, R, Marangos, J P, Heesel, E, Springate, E, Pascolini, M, Poletto, L, Villoresi, P, Vozzi, C, Sansone, G, Anscombe, M, Caumes, J-P, Stagira, S, and Nisoli, M. 2005. "Dependence upon the molecular and atomic ground state of higher-order harmonic generation in the few-optical-cycle regime". United States. https://doi.org/10.1103/PhysRevA.71.013409.
@article{osti_20650262,
title = {Dependence upon the molecular and atomic ground state of higher-order harmonic generation in the few-optical-cycle regime},
author = {Altucci, C and Velotta, R and Marangos, J P and Heesel, E and Springate, E and Pascolini, M and Poletto, L and Villoresi, P and Vozzi, C and Sansone, G and Anscombe, M and Caumes, J-P and Stagira, S and Nisoli, M},
abstractNote = {High-order harmonic generation from molecules (O{sub 2}, N{sub 2}, H{sub 2}, and CO{sub 2}) and atoms (Xe, Ar, and Kr) has been studied in the few optical cycle domain. Two laser peak intensities; 2x10{sup 14} and 6x10{sup 14} W cm{sup -2}, were compared. At the lower intensity spectra were approximately the same for molecules and atoms with the same ionization potential, at higher laser intensity the cutoff of O{sub 2} and CO{sub 2} extends far beyond the cutoff of Xe and Kr, respectively, in contrast with N{sub 2} and H{sub 2} which exhibit cutoffs very close to that of Ar. This behavior is well explained by adopting an atomlike approximation for the molecule response in the high-field regime and employing the Lewenstein's model, properly modified in order to account for the nonlinear dipole moment of a randomly oriented molecule ensemble.},
doi = {10.1103/PhysRevA.71.013409},
url = {https://www.osti.gov/biblio/20650262}, journal = {Physical Review. A},
issn = {1050-2947},
number = 1,
volume = 71,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2005},
month = {Sat Jan 01 00:00:00 EST 2005}
}