SO-FDTD analysis on transmission characteristics of terahertz wave in plasma

Zhou, Zhikun; Wan, Xiaohuan; Li, Xiaolin; Zhang, Juan; Zhou, Yushan; Ren, Xueping; Shi, Yu-Ren

doi:10.1063/5.0053611

Cited by 11 publications

(2 citation statements)

References 39 publications

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“…Liu et al constructed the Runge-Kutta exponential time finite-difference time-domain method to study the propagation characteristics of terahertz waves in cold magnetized plasma (Liu & Chao 2020). Zhou et al used the shift operator finite-difference time-domain method to calculate the propagation characteristics of terahertz waves in high-temperature magnetized plasma (Zhou et al 2021). Hu et al proposed the scattering matrix method (SMM) based on the layered model with equal spacing, which laid a foundation for the study of the propagation characteristics of electromagnetic waves in non-uniform media (Hu, Wei & Lai 1999).…”

Section: Introductionmentioning

confidence: 99%

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A study of the transmission characteristics of terahertz waves in hypersonic target flow field

Zhang

Han²,

Zhao³

et al. 2022

J. Plasma Phys.

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Based on the chemical reaction model proposed by Park, the ‘blackout’ of a reentry vehicle is studied in this paper. The temperature, pressure and electron density distribution characteristics around the reentry vehicle were simulated at various flight speeds and altitudes by USim. Subsequently, the scattering matrix method was used to study the transmission characteristics of terahertz waves in ‘blackout’. The simulation results show that the temperature around the aircraft is mainly affected by speed, the pressure is mainly affected by the altitude and electron density is affected by both of these factors. The calculation results show that the transmission characteristics of terahertz waves in plasma are mainly affected by electron density, while the effects of temperature and pressure cannot be ignored either.

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Section: Introductionmentioning

confidence: 99%

“…used the shift operator finite-difference time-domain method to calculate the propagation characteristics of terahertz waves in high-temperature magnetized plasma (Zhou et al. 2021). Hu et al.…”

Section: Introductionmentioning

confidence: 99%

A study of the transmission characteristics of terahertz waves in hypersonic target flow field

Zhang

Han²,

Zhao³

et al. 2022

J. Plasma Phys.

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Application of the scattering matrix method for investigating the propagation characteristics of terahertz waves in magnetized dusty plasma

Zhang

Wan

et al. 2023

Physics of Plasmas

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A scattering matrix method is applied to investigate propagation characteristics of oblique incident terahertz waves into magnetized dusty plasmas. The numerical results agree well with those given by the Wenzell–Kramer–Brillouin method. Three different electron density distributions are taken into account, and both the right- and left-hand circularly polarized (RCP and LCP) waves are analyzed. Transmission properties of terahertz (THz) waves with different physical parameters, such as external magnetic, dust particle density, and dust particle radius, are discussed systematically. There exists a transmissivity peak at the lower-frequency band for RCP waves when an external magnetic field is presented. The value of the peak nearly keeps invariant, and its location moves toward the higher-frequency direction if the magnetic field enhances. Increasing the dust particle density or radius can make the value of a transmissivity peak larger. The transmissivity of higher-frequency RCP THz waves decreases if the external magnetic field increases. However, for LCP waves, there is no transmissivity peak. It increases monotonously as the frequency of a THz wave increases. Different from the RCP waves, enhancing the external magnetic field is better for the LCP waves to penetrate the dusty plasma. Our results may provide some theoretical basis for alleviating the problem of “blackout.”

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The propagation of Alfvén wave in magnetized plasma sheath of hypersonic vehicles in near space

Xiong,

Yuan,

Tang

et al. 2023

Physics of Plasmas

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Hypersonic plasma sheath could shield communication signals, which results in the so-called “blackout.” Blackout is a major risk to the safety of re-entry vehicles and cruise hypersonic vehicles in near space. In this study, a propagation model of Alfvén waves in plasma sheaths is developed. The impacts of the external magnetic field, the wave frequency, and the boundary conductivity on the Alfvén attenuation were investigated. According to the simulation results, once the conductivity is close to the Alfvénic conductivity near the onboard antenna, the attenuation of Alfvén waves in the plasma sheath could reach its minimum. The total attenuation of the Alfvén wave in the plasma sheath decreases with the carrier frequency. Also, the attenuation decreases with increasing magnetic field strength.

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SO-FDTD analysis on transmission characteristics of terahertz wave in plasma

Cited by 11 publications

References 39 publications

A study of the transmission characteristics of terahertz waves in hypersonic target flow field

A study of the transmission characteristics of terahertz waves in hypersonic target flow field

Application of the scattering matrix method for investigating the propagation characteristics of terahertz waves in magnetized dusty plasma

The propagation of Alfvén wave in magnetized plasma sheath of hypersonic vehicles in near space

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