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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 13, Iss. 12 — Dec. 1, 1996
  • pp: 2724–2728

Effect of time-dependent ionization on the harmonics generated by bound-bound transitions

Enrique Conejero Jarque and Luis Plaja  »View Author Affiliations


JOSA B, Vol. 13, Issue 12, pp. 2724-2728 (1996)
http://dx.doi.org/10.1364/JOSAB.13.002724


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Abstract

We present a study of the effect of time-dependent ionization on harmonic generation by bound–bound transitions. The introduction of tunneling and above-barrier ionization rates in a simple bound system, a two-level atom, induces an unexpected richness in the harmonic spectra, leading to the production of radiation at high frequencies. Such frequencies are not reached when no ionization or steady ionization is considered. Time-dependent ionization is, therefore, a key process in the understanding of generation of middle plateau frequency harmonics from atoms in the tunneling ionization regime and shows that bound–free transitions are not uniquely responsible for the higher-harmonic frequencies in realistic atoms. Following previous authors’ studies, we use an adiabatic approach to understand the presence of these higher frequencies.

© 1996 Optical Society of America

Citation
Enrique Conejero Jarque and Luis Plaja, "Effect of time-dependent ionization on the harmonics generated by bound-bound transitions," J. Opt. Soc. Am. B 13, 2724-2728 (1996)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-13-12-2724

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