Characterization of terahertz emission from laser-induced air plasma under different pump power

Yi-man Luo; Liang-liang Zhang; Ji Zhao; Cun-lin Zhang

doi:10.1117/12.2032924

23 August 2013 Characterization of terahertz emission from laser-induced air plasma under different pump power

Yi-man Luo, Liang-liang Zhang, Ji Zhao, Cun-lin Zhang

Proceedings Volume 8909, International Symposium on Photoelectronic Detection and Imaging 2013: Terahertz Technologies and Applications; 89090F (2013) https://doi.org/10.1117/12.2032924
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

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.

Citation Download Citation

Yi-man Luo, Liang-liang Zhang, Ji Zhao, and Cun-lin Zhang "Characterization of terahertz emission from laser-induced air plasma under different pump power", Proc. SPIE 8909, International Symposium on Photoelectronic Detection and Imaging 2013: Terahertz Technologies and Applications, 89090F (23 August 2013); https://doi.org/10.1117/12.2032924

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