On the influence of electron heat transport on generation of the third harmonic of laser radiation in a dense plasma skin layer

The flux density is determined for radiation emitted by a plasma at the tripled frequency of an ultrashort laser pulse, which produces weak high-frequency modulations of the electron temperature in the plasma skin layer. It is shown that heat removal from the skin layer can reduce high-frequency temperature modulations and decrease the nonlinear plasma response. The optimum conditions for the third harmonic generation are found.