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Proceedings Paper

Characterization of terahertz emission from laser-induced air plasma under different pump power
Author(s): Yi-man Luo; Liang-liang Zhang; Ji Zhao; Cun-lin Zhang
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Paper Abstract

The characterization of the emission of terahertz (THz) waves generated by four-wave mixing in the presence of laser-induced air plasma under different pump power is presented. In our experiment, terahertz is detected using THz Air-Biased Coherent Detection (THz-ABCD) method. Red-shift is observed in frequency spectra with enhanced pump power and the bandwidth is narrowing down. Then the localized terahertz radiation along the plasma was studied, by constricting the emission area with a pinhole. The spatio-frequency dependent of THz emission from laser-induced air plasma is observed. These phenomena are explained by intense self-phase modulation of the optical pulse in the plasma. This study reveals that terahertz spectrum can be controlled by changing the pump power to get useful frequency range.

Paper Details

Date Published: 23 August 2013
PDF: 6 pages
Proc. SPIE 8909, International Symposium on Photoelectronic Detection and Imaging 2013: Terahertz Technologies and Applications, 89090F (23 August 2013); doi: 10.1117/12.2032924
Show Author Affiliations
Yi-man Luo, Capital Normal Univ. (China)
Liang-liang Zhang, Capital Normal Univ. (China)
Ji Zhao, Beijing Institute of Technology (China)
Cun-lin Zhang, Capital Normal Univ. (China)


Published in SPIE Proceedings Vol. 8909:
International Symposium on Photoelectronic Detection and Imaging 2013: Terahertz Technologies and Applications
Marco Rahm; Konstantin Vodopyanov; Wei Shi; Cunlin Zhang, Editor(s)

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