International Journal of Terahertz Science and Technology
  TST >> Vol.4, No.2, June 2011: PP. 46-49
 

THz Radiation from Air Plasma Produced with Aperture-limited Two-color Lasers

H. W. Du 1, X. Y. Peng 2, K. Y. Zhang 1, and Z. M. Sheng 1, 3*
1 Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China
2 Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore 117602, Singapore
3 Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China
*3 Email: zmsheng@sjtu.edu.cn

View Full Text: PDF

Abstract: Terahertz (THz) radiation from air-plasma produced with two-color femtosecond laser pulses has been measured with controlled pump laser energy by an aperture before the laser focusing lens. It is found that the THz amplitude first increases with the laser energy. With the further increase of the laser energy over 320 mJ, the THz amplitude begins to decrease. This is attributed to the phase-shift between the fundamental pump pulse and its second harmonic along the laser filament, which depends upon the air-plasma length and the corresponding plasma density.

Keywords: Terahertz radiation, Air-plasma, Aperture, Two-color lasers.

Received: 2011-4-12

Accepted: 2011-6-10

Published: 2011-6-30

Acknowledgments: This work is supported in part by the NSFC (Grants 10734130 and 11004132) and the National Basic Research Program of China (Grants 2007CB310406 and 2009GB105002).

Cite this article:
H. W. Du, X. Y. Peng, K. Y. Zhang, and Z. M. Sheng. THz Radiation from Air Plasma Produced with Aperture-limited Two-color Lasers[J]. International Journal of Terahertz Science and Technology, 2011, Vol.4, No.2: 46-49.  DOI:10.11906/TST.046-049.2011.06.06

URL: http://www.tstnetwork.org/10.11906/TST.046-049.2011.06.06

 

 
 

Print | close

Copyright© 2008 Scinco Inc. All Rights Reserved
P.O.Box 6982, Williamsburg, VA 23188, USA var cnzz_protocol = (("https:" == document.location.protocol) ? "https://" : "http://");document.write(unescape("%3Cspan id='cnzz_stat_icon_2409046'%3E%3C/span%3E%3Cscript src='" + cnzz_protocol + "s4.cnzz.com/stat.php%3Fid%3D2409046%26show%3Dpic' type='text/javascript'%3E%3C/script%3E"));