FDTD Simulation on Power Absorption of Terahertz Electromagnetic Waves in Dense Plasma

A finite difference time domain （FDTD） method is used to numerically study the power absorption of broadband terahertz （0.1 - 1.5 THz） electromagnetic waves in a partially ionized uniform plasma layer under low pressure and atmosphere discharge conditions. The power absorption spectra are calculated...

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Published inPlasma science & technology Vol. 14; no. 1; pp. 5 - 8
Main Author 奚衍斌 刘悦
Format Journal Article
LanguageEnglish
Published 2012
Subjects
FDTD仿真
吸收功率
太赫兹
时域有限差分法
电子数密度
电磁波
磁化等离子体
稠密等离子体
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Summary:A finite difference time domain （FDTD） method is used to numerically study the power absorption of broadband terahertz （0.1 - 1.5 THz） electromagnetic waves in a partially ionized uniform plasma layer under low pressure and atmosphere discharge conditions. The power absorption spectra are calculated numerically and the numerical results are in accordance with the analytic results. Meanwhile, the effects on the power absorption are calculated with different applied magnetic fields, collision frequencies and electron number densities, which depend strongly on those parameters. Under the dense strongly magnetized plasma conditions, the absorption gaps appear in the range of 0.3 - 0.36 THz, and are enlarged with the increasing electron number density.
Bibliography:plasma absorption, electromagnetic wave, FDTD
A finite difference time domain （FDTD） method is used to numerically study the power absorption of broadband terahertz （0.1 - 1.5 THz） electromagnetic waves in a partially ionized uniform plasma layer under low pressure and atmosphere discharge conditions. The power absorption spectra are calculated numerically and the numerical results are in accordance with the analytic results. Meanwhile, the effects on the power absorption are calculated with different applied magnetic fields, collision frequencies and electron number densities, which depend strongly on those parameters. Under the dense strongly magnetized plasma conditions, the absorption gaps appear in the range of 0.3 - 0.36 THz, and are enlarged with the increasing electron number density.
34-1187/TL
XI Yanbin , LIU Yue （ Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams （Ministry of Education）, School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China）
ISSN:1009-0630
DOI:10.1088/1009-0630/14/1/02