Enhancement of terahertz wave generation from laser induced plasma

被引：63
|
作者：
Xie, Xu [1 ]
Xu, Jingzhou [1 ]
Dai, Jianming [1 ]
Zhang, X. -C. [1 ]
机构：
[1] Rensselaer Polytech Inst, Ctr Terahertz Res, Keck Lab Terahertz Sci, Troy, NY 12180 USA
来源：
APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 14期
基金：
美国国家科学基金会;
关键词：
PULSES; FIELD; AIR;
D O I：
10.1063/1.2719165
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
It is well known that air plasma induced by ultrashort laser pulses emits broadband terahertz waves. The authors report the study of terahertz wave generation from the laser induced plasma where there is a preexisting plasma background. When a laser beam from a Ti:sapphire amplifier is used to generate a terahertz wave, enhancement of the generation is observed if there is another laser beam creating a plasma background. The enhancement of the terahertz wave amplitude lasts hundreds of picoseconds after the preionized background is created, with a maximum enhancement up to 250% observed.
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页数：3
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