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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 16, Iss. 6 — Jun. 1, 1999
  • pp: 986–993

Symmetries in harmonic generation by a two-color field: an application to a simple model atom

S. Bivona, R. Burlon, and C. Leone  »View Author Affiliations

JOSA B, Vol. 16, Issue 6, pp. 986-993 (1999)

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We show that the parity of the order of the harmonics generated by a bichromatic field with commensurate frequencies may be related to the invariance properties of the time-dependent Hamiltonian with respect to some suitable transformations. To simplify the mathematical treatment, we have used a simple model atom to perform calculations that show the effects of the relative phase of the driving fields. Harmonic generation has been described as a two-step process that involves replicas of the Stark levels. In agreement with other previous treatments in which other model atoms were used, we have found that a small contamination of the fundamental harmonic can produce significant modifications of the emission spectra.

© 1999 Optical Society of America

OCIS Codes
(190.4160) Nonlinear optics : Multiharmonic generation
(190.4180) Nonlinear optics : Multiphoton processes

S. Bivona, R. Burlon, and C. Leone, "Symmetries in harmonic generation by a two-color field: an application to a simple model atom," J. Opt. Soc. Am. B 16, 986-993 (1999)

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