Ionization-Induced Multiwave Mixing: Terahertz Generation with Two-Color Laser Pulses of Various Frequency Ratios

被引：89

作者：

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

Laryushin, I. D. ^{[1
,2
]}

Silaev, A. A. ^{[1
,2
]}

Vvedenskii, N. V. ^{[1
,2
]}

机构：

[1] Russian Acad Sci, Inst Appl Phys, Nizhnii Novgorod 603950, Russia

[2] Univ Nizhny Novgorod, Nizhnii Novgorod 603950, Russia

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 117卷 / 03期

基金：

俄罗斯科学基金会; 俄罗斯基础研究基金会;

关键词：

AIR; LIGHT;

D O I：

10.1103/PhysRevLett.117.035003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Ultrafast strong-field ionization is shown to be accompanied by atypical multiwave mixing with the number of mixed waves defined by the dependence of the ionization rate on the field strength. For two-color laser pulses of various frequency ratios, this results in the excitation of a free-electron current at laser combination frequencies and possibly in the excitation of the zero-frequency (residual) current responsible for terahertz (THz) generation in a formed plasma. The high-order nature of ionization-induced wave mixing may cause THz generation with uncommon laser frequency ratios (such as 2:3 and 3:4) to be virtually as effective as that with the commonly used frequency ratio of 1:2.

引用

页数：5

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