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Two- and three-photon ionization of rare gases using femtosecond harmonic pulses generated in a gas medium

Descamps, D; Roos, L; Delfin, C; L'Huillier, Anne LU and Wahlström, Claes-Göran LU (2001) In Physical Review A (Atomic, Molecular and Optical Physics) 64(3).
Abstract
The fifth harmonic of a 60-fs 10-Hz terawatt titanium:sapphire laser generated in Xe gas is used to ionize Xe and Kr atoms by nonresonant two-photon absorption and At atoms through a quasiresonant three-photon process. At relatively low harmonic yields, the variation of the number of Kr and Xe ions with the number of harmonic photons is quadratic. At high harmonic yields, it deviates from a quadratic behavior, which we attribute to the influence of ionization in the harmonic process distorting the harmonic wave front. The two-photon ionization cross sections in Xe and Kr at 160 nm are found to be comparable.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A (Atomic, Molecular and Optical Physics)
volume
64
issue
3
publisher
American Physical Society (APS)
external identifiers
  • scopus:0035440586
ISSN
1050-2947
DOI
10.1103/PhysRevA.64.031404
language
English
LU publication?
yes
id
d9a07acb-4a0d-4851-a347-f6fb60d511d8 (old id 2257847)
date added to LUP
2012-02-22 23:27:15
date last changed
2018-05-29 09:39:11
@article{d9a07acb-4a0d-4851-a347-f6fb60d511d8,
  abstract     = {The fifth harmonic of a 60-fs 10-Hz terawatt titanium:sapphire laser generated in Xe gas is used to ionize Xe and Kr atoms by nonresonant two-photon absorption and At atoms through a quasiresonant three-photon process. At relatively low harmonic yields, the variation of the number of Kr and Xe ions with the number of harmonic photons is quadratic. At high harmonic yields, it deviates from a quadratic behavior, which we attribute to the influence of ionization in the harmonic process distorting the harmonic wave front. The two-photon ionization cross sections in Xe and Kr at 160 nm are found to be comparable.},
  author       = {Descamps, D and Roos, L and Delfin, C and L'Huillier, Anne and Wahlström, Claes-Göran},
  issn         = {1050-2947},
  language     = {eng},
  number       = {3},
  publisher    = {American Physical Society (APS)},
  series       = {Physical Review A (Atomic, Molecular and Optical Physics)},
  title        = {Two- and three-photon ionization of rare gases using femtosecond harmonic pulses generated in a gas medium},
  url          = {http://dx.doi.org/10.1103/PhysRevA.64.031404},
  volume       = {64},
  year         = {2001},
}