Elliptically polarized terahertz emission in the forward directionof a femtosecond laser filament in air

Elliptically polarized terahertz emission from a femtosecond laser filament in air in the forward direction was discovered by using a wire grid polarizer and electro-optic sampling technique. The generation mechanism could be through four-wave optical rectification or second-order optical rectificat...

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Bibliographic Details
Published in:Applied physics letters 2008-12, Vol.93 (23), p.231116-231116-3
Main Authors: Chen, Yanping, Marceau, Claude, Liu, Weiwei, Sun, Zhen-Dong, Zhang, Yizhu, Théberge, Francis, Châteauneuf, Marc, Dubois, Jacques, Chin, See Leang
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Summary:Elliptically polarized terahertz emission from a femtosecond laser filament in air in the forward direction was discovered by using a wire grid polarizer and electro-optic sampling technique. The generation mechanism could be through four-wave optical rectification or second-order optical rectification inside the filament zone where the inversion symmetry of air is broken.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3046781