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Proceedings Paper

Transmission characteristics of terahertz laser in underdense plasmas generated by DC discharge
Author(s): Runhui Wu; Jiaqi Liu; Xin Liu; Gang Meng; Aimin Ren; Xia Ai; Mingliang Wang; Yanan Li; Juyan Zhao
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Paper Abstract

In this paper, terahertz (THz) characteristics of a direct current (DC) arc discharge uniform plasma are analyzed, which is of practical significance in plasma diagnostics with electromagnetic waves. A model for estimating total collision frequency of DC arc discharge plasma is built based on the Coulomb model and elastic scattering model. Explicit expressions for attenuation coefficient and transmission coefficient of THz wave propagating through a uniform plasma are obtained, which are expressed as a function of plasma frequency and collision frequency in the DC arc discharge. Detailed numerical analysis and discussions are conducted to reveal the influence of electron density, collision frequency, thickness of the plasma, and incident angle of the wave on the transmission characteristics of THz wave in plasma. Results show that the greater are the electron density, collision frequency and transmission length of a wave propagating in plasma, more power of the wave is attenuated. The attenuation energy of laser under horizontal sending and horizontal receiving (HH) polarity is as same as the vertical sending and vertical receiving (VV) polarity in underdense plasma.

Paper Details

Date Published: 24 October 2017
PDF: 9 pages
Proc. SPIE 10462, AOPC 2017: Optical Sensing and Imaging Technology and Applications, 104621G (24 October 2017); doi: 10.1117/12.2283480
Show Author Affiliations
Runhui Wu, National Key Lab. of Science and Technology on Test Physics & Numerical Mathematics (China)
Jiaqi Liu, National Key Lab. of Science and Technology on Test Physics & Numerical Mathematics (China)
Xin Liu, National Key Lab. of Science and Technology on Test Physics and Numerical Mathematics (China)
Gang Meng, National Key Lab. of Science and Technology on Test Physics & Numerical Mathematics (China)
Aimin Ren, National Key Lab. of Science and Technology on Test Physics & Numerical Mathematics (China)
Xia Ai, National Key Lab. of Science and Technology on Test Physics & Numerical Mathematics (China)
Mingliang Wang, National Key Lab. of Science and Technology on Test Physics & Numerical Mathematics (China)
Yanan Li, National Key Lab. of Science and Technology on Test Physics & Numerical Mathematics (China)
Juyan Zhao, National Key Lab. of Science and Technology on Test Physics & Numerical Mathematics (China)


Published in SPIE Proceedings Vol. 10462:
AOPC 2017: Optical Sensing and Imaging Technology and Applications
Yadong Jiang; Haimei Gong; Weibiao Chen; Jin Li, Editor(s)

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