Plasma channel produced by femtosecond laser pulses as a medium for amplifying electromagnetic radiation of the subterahertz frequency range

被引：21

作者：

Bogatskaya, A. V. ^{[1
,2
]}

Volkova, E. A. ^{[1
]}

Popov, A. M. ^{[1
,2
]}

机构：

[1] Moscow MV Lomonosov State Univ, DV Skobeltsyn Inst Nucl Phys, Moscow 119991, Russia

[2] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119991, Russia

来源：

QUANTUM ELECTRONICS | 2013年 / 43卷 / 12期

基金：

俄罗斯基础研究基金会;

关键词：

multiphoton ionisation; plasma channel; electromagnetic radiation amplification; electron energy distribution function; ELECTRONS;

D O I：

10.1070/QE2013v043n12ABEH015238

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The electron energy distribution function in the plasma channel produced by a femtosecond laser pulse with a wavelength of 248 nm in atmospheric-pressure gases was considered. Conditions were determined whereby this channel may be employed for amplifying electromagnetic waves up to the terahertz frequency range over the energy spectrum relaxation time similar to 10(-7) s. Gains were calculated as functions of time and radiation frequency. The effect of electron-electron collisions on the rate of relaxation processes in the plasma and on its ability to amplify the electromagnetic radiation was investigated.

引用

页码：1110 / 1117

页数：8

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