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首页> 外文期刊>Physics of plasmas >Propagation of broadband terahertz pulses through a dense-magnetized- collisional-bounded plasma layer
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Propagation of broadband terahertz pulses through a dense-magnetized- collisional-bounded plasma layer

机译：宽带太赫兹脉冲通过密集磁化碰撞界等离子体层的传播

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摘要

The terahertz characteristics of a dense-magnetized-collisional-bounded plasma under normal incident are analyzed in this study, which is of practical significance in plasma diagnostics with electromagnetic waves. We theoretically calculate the reflection, absorption, and transmission coefficients for right- and left-handed polarized terahertz waves through a uniform, magnetized, and collisional plasma slab bounded by lossless transparent walls. The power absorption spectra in the frequency range of 0.1-2 THz are given with strong external magnetic fields and different plasma parameters such as plasma density and collisional frequency. Our numerical result is consistent with Jamison's experimental result. It is found that plasma absorption is mainly caused by the collisional absorption and electron cyclotron resonance. Furthermore, the absorption heavily depends on the polarization mode of the terahertz waves when the external magnetic field B is high enough that the election gyrofrequency is near the incident wave frequency. The relationships between the corresponding parameters of the problem are studied numerically.
机译：本研究分析了垂直入射下密集磁化碰撞结合等离子体的太赫兹特性，这在电磁波等离子体诊断中具有实际意义。我们从理论上计算通过均匀，磁化和碰撞的等离子平板（以无损透明壁为边界）的右旋和左旋极化太赫兹波的反射，吸收和透射系数。给出了0.1-2 THz频率范围内的功率吸收谱，其中具有强大的外部磁场和不同的等离子体参数，例如等离子体密度和碰撞频率。我们的数值结果与贾米森的实验结果一致。发现等离子体吸收主要是由碰撞吸收和电子回旋共振引起的。此外，当外部磁场B足够高以至于选择陀螺频率接近入射波频率时，吸收在很大程度上取决于太赫兹波的极化模式。对问题的相应参数之间的关系进行了数值研究。

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