Bright single-cycle terahertz source based on gas cells irradiated by two-color laser pulses

被引：0

作者：

Liseykina, T., V ^{[1
,2
]}

Popruzhenko, S., V ^{[3
,4
]}

机构：

[1] Univ Rostock, Inst Phys, D-18051 Rostock, Germany

[2] Inst Computat Math & Math Geophys SB RAS, Lavrentev Ave 6, Novosibirsk 630090, Russia

[3] RAS, Prokhorov Gen Phys Inst, Vavilova Str 38, Moscow 119991, Russia

[4] Voronezh State Univ, Univ Skaya Pl 1, Voronezh 394036, Russia

来源：

31ST INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC XXXI) | 2020年 / 1412卷

基金：

俄罗斯科学基金会;

关键词：

EMISSION; PLASMAS;

D O I：

10.1088/1742-6596/1412/4/042005

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the excitation of electron currents in a transparent cell of sub-millimeter size filled by an atomic gas and illuminated by an intense two-color femtosecond laser pulse. The pulse consists of a strong fundamental component and its second harmonic of low intensity, both circularly polarized. We show that for a sufficiently small 20 mu m-size interaction volume the plasma oscillation excited by asymmetric ionization is almost spatially homogeneous. This coherent dipole plasma oscillation results in a remarkably efficient conversion of the electron energy into that of radiation emitted in the terahertz frequency domain. Simultaneously, strong quasi-static electric fields of maximal strength E-m similar or equal to 10 MV/cm are shown to exist inside the plasma during several hundred femtoseconds after the ionizing two-color laser pulse has gone.

引用

页数：8

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