THz generation by optical Cherenkov emission from ionizing two-color laser pulses

被引：36

作者：

Johnson, L. A. ^{[1
]}

Palastro, J. P. ^{[1
]}

Antonsen, T. M. ^{[1
]}

Kim, K. Y. ^{[1
]}

机构：

[1] Univ Maryland, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW A | 2013年 / 88卷 / 06期

基金：

美国国家科学基金会;

关键词：

MULTIPHOTON IONIZATION; TERAHERTZ EMISSION; FILAMENTATION; TUNNEL; FIELD; ATOMS;

D O I：

10.1103/PhysRevA.88.063804

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Two-color photoionization produces a cycle-averaged current driving broadband, conically emitted THz radiation. We investigate, through simulation, the processes determining the angle of conical emission. We find that the emission angle is determined by an optical Cherenkov effect, where the front velocity of the current source is faster than the THz phase velocity.

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页数：9

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