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Proceedings Paper

Elliptically polarized terahertz emission from a femtosecond laser filament in air
Author(s): Yanping Chen; Claude Marceau; Weiwei Liu; Zhen-Dong Sun; Yizhu Zhang; Francis Théberge; Marc Châteauneuf; Jacques Dubois; See Leang Chin
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Paper Abstract

We diagnosed the polarization characteristics of Terahertz (THz) emission from a femtosecond laser filament in air in the forward direction by using a wire grid polarizer and E-O sampling technique. The experimental results have demonstrated that the investigated THz pulse is elliptical polarized. It indicates that there is a new generation mechanism for THz emission from a laser filament other than the transition-Cherenkov radiation which is radially polarized. The generation mechanism could be through four-wave optical rectification or second-order optical rectification inside the filament due to the spatial asymmetry of the generated plasma column in the experiment.

Paper Details

Date Published: 16 February 2009
PDF: 9 pages
Proc. SPIE 7277, Photonics and Optoelectronics Meetings (POEM) 2008: Terahertz Science and Technology, 727709 (16 February 2009); doi: 10.1117/12.820134
Show Author Affiliations
Yanping Chen, Univ. Laval (Canada)
Claude Marceau, Univ. Laval (Canada)
Weiwei Liu, Nankai Univ. (China)
Zhen-Dong Sun, Univ. Laval (Canada)
Yizhu Zhang, Nankai Univ. (China)
Francis Théberge, Defence Research and Development Canada-Valcartier (Canada)
Marc Châteauneuf, Defence Research and Development Canada-Valcartier (Canada)
Jacques Dubois, Defence Research and Development Canada-Valcartier (Canada)
See Leang Chin, Univ. Laval (Canada)


Published in SPIE Proceedings Vol. 7277:
Photonics and Optoelectronics Meetings (POEM) 2008: Terahertz Science and Technology
Jianquan Yao; Shenggang Liu; Xi-Cheng Zhang, Editor(s)

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