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Cooperative effects on multiphoton ionization and third-harmonic generation in the region near three-photon resonance

Journal Article · · Phys. Rev. A; (United States)
Three-photon resonance enhancement of third-harmonic generation and multiphoton ionization is treated for a slab geometry configuration. Striking pressure effects which become important at concentrations n> or approx. =10/sup 12//cm/sup 3/ for narrow-bandwidth short-pulse lasers are predicted for both the third-harmonic signal and the multiphoton ionization. For example, part of the third-harmonic signal exits the slab simultaneously with the laser pulse while another part is time delayed for small detunings from resonance. At intermediate detuning from the three-photon resonance the two parts can interfere. Multiphoton ionization yields near three-photon resonance are strongly suppressed under certain conditions, and peaks may occur for proper detunings on both sides of the three-photon resonance. A detailed experimental verification is suggested for Xe.
Research Organization:
Chemical Physics Section, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
OSTI ID:
6864395
Journal Information:
Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 26:1; ISSN PLRAA
Country of Publication:
United States
Language:
English