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Proceedings Paper

The study of terahertz wave generation via pre-ionized air plasma
Author(s): Kai Kang; Liangliang Zhang; Tong Wu; Kai Li; Bo Peng; Cunlin Zhang
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Paper Abstract

The methods of terahertz (THz) wave generation has attracted considerable attention in recent years because it involves a complex plasma process. The theories used to explain the intrinsic mechanism of laser ionization of air to produce THz wave are not particularly numerous, further exploration of its mechanism in the air is necessary. We report the THz wave generation from single color scheme modulated by pre-ionized air plasma via an orthogonal pumping geometry. It is found that the amplitude of the THz signal generated by the pump beam tends to decrease gradually with the increase of the modulation power. We believe that the ponderomotive force plays an important role in the process of the interaction between the pump beam and pre-ionization beam. The hydrostatic state of the electrostatic separation field caused by modulation beam will directly affect the generation efficiency of the THz wave. Our results contribute to further understanding of the theoretical mechanism and expanding of the practical applications of THz wave generation and modulation.

Paper Details

Date Published: 9 November 2018
PDF: 5 pages
Proc. SPIE 10826, Infrared, Millimeter-Wave, and Terahertz Technologies V, 108261F (9 November 2018); doi: 10.1117/12.2501389
Show Author Affiliations
Kai Kang, Capital Normal Univ. (China)
Liangliang Zhang, Capital Normal Univ. (China)
Tong Wu, Beijing Institute of Technology (China)
Kai Li, Daheng New Epoch Technology Inc. (China)
Bo Peng, Daheng New Epoch Technology Inc. (China)
Cunlin Zhang, Capital Normal Univ. (China)

Published in SPIE Proceedings Vol. 10826:
Infrared, Millimeter-Wave, and Terahertz Technologies V
Cunlin Zhang; Xi-Cheng Zhang; Masahiko Tani, Editor(s)

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