FDTD Analysis of Terahertz Wave Propagation in a High-Temperature Unmagnetized Plasma Slab

Yuan, Chengxun; Zhou, Zhongxiang; Zhang, Jingwen W.; Xiang, Xiaoli; Feng, Yongbao; Sun, Haonan

doi:10.1109/tps.2011.2151207

Cited by 68 publications

(16 citation statements)

References 36 publications

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“…Additionally, previous studies show that the temperature influences the attenuation of THz waves in plasma sheaths [10,11]. According to the theory by Mehra et al [22], the radio wave attenuation in unmagnetized reentry plasma sheath is determined by the radio frequency, plasma frequency, collision frequency and length of the transmission path.…”

Section: Resultsmentioning

confidence: 98%

“…On the other hand, some other researchers tried to investigate the transmission properties of THz waves in dense plasma. By performing one-dimensional FDTD simulation, Yuan et al analyzed the THz waves' transmission and reflection in a hot unmagnetized plasma slab [10]. According to their study, the amplitude of transmitted THz wave is obviously modulated by the electron density profile, electron collision frequency and electron temperature.…”

Section: Introductionmentioning

confidence: 99%

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Studies of Terahertz Wave Propagation in Realistic Reentry Plasma Sheath

Chen¹,

Yuan²,

Shen³

et al. 2016

PIER

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Abstract-Communication 'blackout' is a big challenge for modern space engineering. In the recent decade, the terahertz (THz) technology is believed to be an effective solution for the 'blackout' problem. Many research works about the transmission of THz waves in plasma slabs have been carried out. According to those works, the radio attenuation of THz waves in plasma slabs strongly depends on thickness of the slab, electron density, electron collision frequency and temperature. However, few previous works have paid attention to realistic reentry plasma sheath. In the present paper, a hypersonic fluid model is introduced in order to investigate the structure of the realistic plasma sheath which covers a blunt coned vehicle. The scattering matrix method is employed to study the transmission of THz waves in realistic plasma sheath. According to the present study, the wave frequency, electron density and collision frequency are the most significant factors which determine the attenuation of the THz waves in the plasma sheath. Since the whole plasma sheath is inhomogeneous, to install the antenna at an appropriate position helps mitigate the 'blackout'. For the blunt coned reentry vehicle, installing the antenna on the wall close to the bottom is helpful for mitigating the 'blackout' problem.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Studies of Terahertz Wave Propagation in Realistic Reentry Plasma Sheath

Chen¹,

Yuan²,

Shen³

et al. 2016

PIER

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“…Therefore, the THz waves (0.1-10 THz) are much easier than millimeter waves to propagate through plasma with electron density up to 10 24 m -3 . 5 Since the ultrafast laser technic promotes the investigation on terahertz wave, many theoretical and experimental studies have been conducted on the phenomenon and transmission characteristics of the THz waves interacting with plasma in recent years, 6,7 which are meaningful to hypersonic vehicles detection and blackout mitigation. 5,8 Numerical methods have been used to investigate the interactions between the EM wave and plasma sheath with non-uniform electron density distribution.…”

Section: Introductionmentioning

confidence: 99%

“…Many different algorithms have been proposed to study the transmission and absorption of EM wave in non-uniform plasma, such as the WKB method, 9 integro-differential equation, 10 scattering matrix method (SMM) 5,11,12 and FDTD. 7,13 However, to our knowledge, most of these researches were focused on the interaction between vertically-incident wave and non-homogeneous plasma, 14,15 and few researches were focused on the obliquely incident wave. In addition, most works assume that all the reflected power directly transferred to the incident boundary.…”

Section: Introductionmentioning

confidence: 99%

Effects of magnetized plasma on the propagation properties of obliquely incident THz waves

Tian

Yan

et al. 2017

AIP Advances

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In this paper, the propagation of obliquely incident terahertz (THz) wave in a non-uniform magnetized plasma slab is investigated. The electron density and the collision frequency across the plasma are assumed to have a Gaussian profile. To deal with the non-uniform profile, the plasma slab is divided into a series of subslabs. For more accuracy, twice reflection between the interfaces of each subslab is considered, and the corresponding transmitted and reflected power are derived. Effects of collision frequency, magnetic field amplitude and incident angle on THz wave propagation characteristics are investigated. Specifically, the refraction angles in each subslab are presented. These simulation results are meaningful for the hypersonic flight communication.

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“…Nevertheless, almost all these researches were limited in the microwave frequency band. Since major technical advances in the developing of terahertz sources have been provided recently [9][10][11][12], several experimental and numerical works involved in the interaction between terahertz waves and plasmas have been reported [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

A Dispersive Conformal FDTD Technique for Accurate Modeling Electromagnetic Scattering of THZ Waves by Inhomogeneous Plasma Cylinder Array

Ai¹,

Tian²,

Cui³

et al. 2013

PIER

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Abstract-A dispersive conformal FDTD method has been proposed to accurately model the interface between two adjacent dispersive mediums and implemented to study the scattering of THz electromagnetic (EM) waves by inhomogeneous collisional plasma cylinder array. The method is based on the technology of area average, which is different from existing dispersive conformal FDTD schemes. Numerical results show that the proposed method enhances the accuracy level compared to the staircasing FDTD scheme involved in the inhomogeneous plasma. It is interesting to find that the THz EM waves can propagate through the plasma array more easily with higher frequencies or larger separations, hence the scattering width in the backward direction becomes smaller, and the forward scattering exhibits a little different. This study will be useful for further designing intelligent plasma antenna arrays in the THz band and terahertz reentry telemetry through plasma.

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FDTD Analysis of Terahertz Wave Propagation in a High-Temperature Unmagnetized Plasma Slab

Cited by 68 publications

References 36 publications

Studies of Terahertz Wave Propagation in Realistic Reentry Plasma Sheath

Studies of Terahertz Wave Propagation in Realistic Reentry Plasma Sheath

Effects of magnetized plasma on the propagation properties of obliquely incident THz waves

A Dispersive Conformal FDTD Technique for Accurate Modeling Electromagnetic Scattering of THZ Waves by Inhomogeneous Plasma Cylinder Array

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