Two-color multiphoton ionization and harmonic generation

F. Giammanco; P. Ceccherini; T. M. Di Palma

doi:10.1117/12.341466

5 March 1999 Two-color multiphoton ionization and harmonic generation

F. Giammanco, P. Ceccherini, T. M. Di Palma

Proceedings Volume 3735, ICONO '98: Ultrafast Phenomena and Interaction of Superstrong Laser Fields with Matter: Nonlinear Optics and High-Field Physics; (1999) https://doi.org/10.1117/12.341466
Event: ICONO '98: Laser Spectroscopy and Optical Diagnostics: Novel Trends and Applications in Laser Chemistry, Biophysics, and Biomedicine, 1998, Moscow, Russian Federation

Abstract

We present a short summary of results dealing with the harmonic generation in N₂ and Ar produced by wave-mixing of parallel polarized fundamental and second harmonics of a Nd-YAG picosecond laser with special regard to the influence of phase-matching due to refractive index electrons produced by two-color multiphoton ionization. Particularly, in this work we compare the harmonic conversion efficacy and the rate of ionization by a self-correlation technique between fundamental and second harmonics of laser. We show that ion and harmonic signal exhibit the same behavior versus the relative delay of both fields. It seems to suggest, at least in our conditions, a positive influence of ionization on harmonic conversion efficiency.

Citation Download Citation

F. Giammanco, P. Ceccherini, and T. M. Di Palma "Two-color multiphoton ionization and harmonic generation", Proc. SPIE 3735, ICONO '98: Ultrafast Phenomena and Interaction of Superstrong Laser Fields with Matter: Nonlinear Optics and High-Field Physics, (5 March 1999); https://doi.org/10.1117/12.341466

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