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Shengqi Xu, Yizhu Zhang, Yinbo Zheng, Weiwei Liu *
Institute of Modern Optics, Nankai University,
Key Laboratory of Opto-electronic Information Science and Technology,
Education Ministry of China, Tianjin 300071, P.R. China
* Email: liuweiwei@nankai.edu.cn
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Abstract: THz wave generation during the laser-air interaction is investigated both experimentally and theoretically. The pump laser is a combination of a femtosecond Ti:sapphire laser pulse and its second harmonic. The polarization of the generated THz wave is experimentally measured. Comparison study has been carried out theoretically between the free electron drifting current model and the macroscopic four-wave mixing model. The result indicates that the four-wave mixing model could give better description to the experimental observations rather than the free electron drifting current model.
Keywords: Femtosecond laser, Terahertz generation, Four-wave mixing.
Received: 2009-12-8
Accepted: 2010-8-3
Published: 2010-9-29
Acknowledgments: The authors acknowledges the support of the 973 Program (grant No.2007CB310403.), NSFC (grants No. 10804056), NCET, SRFDP, Fok Ying Tong Education foundation, the open fund of the State Key Laboratory of High field Laser Physics (SIOM) and SRF for ROCS, SEM. SLC acknowledges the support of Canada Research Chair and NSERC.
Cite this article:
Shengqi Xu, Yizhu Zhang, Yinbo Zheng, Weiwei Liu. Study of Physical Mechanism of Two-color Laser Field Pumped THz Wave in Air Plasma[J]. International Journal of Terahertz Science and Technology, 2010, Vol.3, No.3: 130-142. DOI:10.11906/TST.130-142.2010.09.13
URL: http://www.tstnetwork.org/10.11906/TST.130-142.2010.09.13
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