Enhancement of terahertz wave generation from laser induced plasma
Enhancement of terahertz wave generation from laser induced plasma
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DOI：
10.1063/1.2719165
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发表时间：
2007-04
影响因子：
4
通讯作者：
Xu Xie;Jingzhou Xu;J. Dai;Xiang Zhang
中科院分区：
文献类型：
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作者：
Xu Xie;Jingzhou Xu;J. Dai;Xiang Zhang
众所周知，由超短激光脉冲诱导的空气等离子体发射出宽带太赫兹波。作者报告了激光诱导等离子体产生太赫兹波的研究，其中有一个预先存在的等离子体背景。当来自Ti：蓝宝石放大器的激光束用于产生太赫兹波时，如果有另一束激光束产生等离子体背景，则可以观察到产生的增强。在预电离背景产生后，太赫兹波振幅的增强持续数百皮秒，最大增强可达250%。
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.