Terahertz emission from a dc-biased two-color femtosecond laser-induced filament in air
Terahertz emission from a dc-biased two-color femtosecond laser-induced filament in air
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DOI：
10.1063/1.3441004
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发表时间：
2010-05
影响因子：
4
通讯作者：
Tie-Jun Wang;C. Marceau;Yanping Chen;S. Yuan;F. Théberge;M. Châteauneuf;J. Dubois;S. Chin
中科院分区：
文献类型：
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作者：
Tie-Jun Wang;C. Marceau;Yanping Chen;S. Yuan;F. Théberge;M. Châteauneuf;J. Dubois;S. Chin
系统地研究了飞秒激光在空气中产生太赫兹辐射的机制。偏振分析表明，太赫兹辐射可以是两个分量的总和：一个由双色激光诱导的双折射产生的，第二个由外部直流电场诱导。第一个分量主要来自四波混频过程，在外加直流场作用下产生的瞬态横向电流可能是第二个THz辐射的主要来源。
The generation of terahertz (THz) emission from a dc-biased two-color femtosecond laser-induced filament in air was systematically investigated. A polarization analysis demonstrated that the THz emission could be the sum of two components: one generated by two-color laser-induced filamentation and the second induced by the external dc electric field. The first component is mostly from four-wave mixing process and a transient transverse electric current under the action of the external dc field could be responsible for the second THz emission.