Third-harmonic generation with ultrahigh-intensity laser pulses

J. M. Rax, N. J. Fisch

Research output: Contribution to journalArticlepeer-review

92 Scopus citations


When an intense, plane-polarized, laser pulse interacts with a plasma, the relativistic nonlinearities induce a third-harmonic polarization. A phase-locked growth of a third-harmonic wave can take place, but the difference between the nonlinear dispersion of the pump and driven waves leads to a rapid unlocking, resulting in a saturation. What become third-harmonic amplitude oscillations are identified here, and the nonlinear phase velocity and the renormalized electron mass due to plasmon screening are calculated. A simple phase-matching scheme, based on a resonant density modulation, is then proposed and analyzed.

Original languageEnglish (US)
Pages (from-to)772-775
Number of pages4
JournalPhysical review letters
Issue number5
StatePublished - 1992

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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