Medium propagation effects in high-order harmonic generation of Ar and N{sub 2}

Journal Article · Tue Feb 15 04:00:00 EST 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.023411· OSTI ID:21537178

Cheng, Jin; Le, Anh-Thu; Lin, C D ^[1]

---

1. J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, Kansas 66506-2604 (United States)

We report theoretical calculations of high-order harmonic generation (HHG) by intense infrared lasers in atomic and molecular targets taking into account the macroscopic propagation of both fundamental and harmonic fields. On the examples of Ar and N{sub 2}, we demonstrate that these ab initio calculations are capable of accurately reproducing available experimental results with isotropic and aligned target media. We further present detailed analysis of HHG intensity and phase under various experimental conditions, in particular, as the wavelength of the driving laser changes. Most importantly, our results strongly support the factorization of HHG at the macroscopic level into a product of a returning electron wave packet and the photorecombination transition dipole under typical experimental conditions. This implies that the single-atom or single-molecule structure information can be retrieved from experimentally measured HHG spectra.

• OSTI ID: 21537178
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOMS
DIPOLES
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
FACTORIZATION
FERMIONS
FLUIDS
FREQUENCY MIXING
GASES
HARMONIC GENERATION
INFRARED RADIATION
LASER RADIATION
LEPTONS
MOLECULAR STRUCTURE
MULTIPOLES
NITROGEN
NONMETALS
RADIATIONS
RARE GASES
SPECTRA
WAVE PACKETS
WAVELENGTHS