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Optics Express

Optics Express

  • Editor: Martijn de Sterke
  • Vol. 16, Iss. 20 — Sep. 29, 2008
  • pp: 15483–15488

Non-radially polarized THz pulse emitted from femtosecond laser filament in air

Y. Zhang, Y. Chen, C. Marceau, W. Liu, Z.-D Sun, S. Xu, F. Théberge, M. Châteauneuf, J. Dubois, and S. L. Chin  »View Author Affiliations


Optics Express, Vol. 16, Issue 20, pp. 15483-15488 (2008)
http://dx.doi.org/10.1364/OE.16.015483


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Abstract

Femtosecond laser filament could produce THz wave in forward direction. In our experiment, THz pulse emitted from a femtosecond laser filament has been investigated. It was found that the polarization of the studied THz pulse mainly appears as elliptical. This observation supplements the previous conclusion obtained by C. D’Amico et al. that THz wave emitted by a filament is radially polarized. The mechanism of generating elliptically polarized THz wave has been interpreted by either four-wave optical rectification or second order optical rectification inside the filament zone where centro-symmetry of the air is broken by the femtosecond laser pulse.

© 2008 Optical Society of America

OCIS Codes
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:
Nonlinear Optics

History
Original Manuscript: August 5, 2008
Revised Manuscript: September 6, 2008
Manuscript Accepted: September 7, 2008
Published: September 16, 2008

Citation
Y. Zhang, Y. Chen, C. Marceau, W. Liu, Z.-D. Sun, S. Xu, F. Théberge, M. Châteauneuf, J. Dubois, and S. L. Chin, "Non-radially polarized THz pulse emitted from femtosecond laser filament in air," Opt. Express 16, 15483-15488 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-20-15483


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