A. V. Bogatskaya, A. M. Popov, “On the possibility of the amplification of subterahertz electromagnetic radiation in a plasma channel created by a high-intensity ultrashort laser pulse”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2013, Volume 97, Issue 7,Pages <nobr>453

This article is cited in 57 papers

PLASMA, HYDRO- AND GAS DYNAMICS

On the possibility of the amplification of subterahertz electromagnetic radiation in a plasma channel created by a high-intensity ultrashort laser pulse

A. V. Bogatskaya^ab, A. M. Popov^ab

^a M. V. Lomonosov Moscow State University, Faculty of Physics
^b Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University

Abstract: The evolution of the electron energy distribution function in a plasma channel in a xenon plasma at atmospheric pressure created by radiation of a KrF femtosecond laser has been considered. It has been shown that, owing to the existence of the Ramsauer minimum in the transport scattering cross section, such a channel can be used to amplify electromagnetic waves up to the terahertz frequency range at relaxation times of the energy spectrum of ${\sim}\,10^{-7}$ s. The gain factor has been calculated as a function of the time and radiation frequency.

Received: 30.01.2013

DOI: 10.7868/S0370274X13070035