Terahertz emission from a dc-biased two-color femtosecond laser-induced filament in air

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 t...

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Bibliographic Details
Published in:Applied physics letters 2010-05, Vol.96 (21), p.211113-211113-3
Main Authors: Wang, Tie-Jun, Marceau, Claude, Chen, Yanping, Yuan, Shuai, Théberge, Francis, Châteauneuf, Marc, Dubois, Jacques, Chin, See Leang
Format: Article
Language:English
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Summary: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3441004