Analysis of terahertz wave penetration capacity to 2D conductive cylinder coated with steady-state parabolic distribution plasma media

Sun, Shuobei; Liu, Song; Zhong, Shuangying

doi:10.1016/j.rinp.2021.104516

Cited by 6 publications

(2 citation statements)

References 25 publications

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“…Hence, there is a compelling quest for a metamaterial absorber design capable of realizing tunable absorption performance, polarization independence, resistance to variations in incident angles, and exceptional sensing capabilities. In the pursuit of these goals, researchers have harnessed an array of diverse metamaterials, encompassing noble metals [ 21 ], graphene [ 22 ], vanadium dioxide [ 23 ], and Dirac semimetals [ 24 ]. Notably, graphene has risen to prominence as a standout candidate, owing to its unparalleled electrical conductivity and carrier mobility [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Design of a Penta-Band Graphene-Based Terahertz Metamaterial Absorber with Fine Sensing Performance

Lai,

Chen,

Zhou

et al. 2023

Micromachines

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This paper presents a new theoretical proposal for a surface plasmon resonance (SPR) terahertz metamaterial absorber with five narrow absorption peaks. The overall structure comprises a sandwich stack consisting of a gold bottom layer, a silica medium, and a single-layer patterned graphene array on top. COMSOL simulation represents that the five absorption peaks under TE polarization are at fI = 1.99 THz (95.82%), fⅡ = 6.00 THz (98.47%), fⅢ = 7.37 THz (98.72%), fⅣ = 8.47 THz (99.87%), and fV = 9.38 THz (97.20%), respectively, which is almost consistent with the absorption performance under TM polarization. In contrast to noble metal absorbers, its absorption rates and resonance frequencies can be dynamically regulated by controlling the Fermi level and relaxation time of graphene. In addition, the device can maintain high absorptivity at 0~50° in TE polarization and 0~40° in TM polarization. The maximum refractive index sensitivity can reach SV = 1.75 THz/RIU, and the maximum figure of merit (FOM) can reach FOMV = 12.774 RIU−1. In conclusion, our design has the properties of dynamic tunability, polarization independence, wide-incident-angle absorption, and fine refractive index sensitivity. We believe that the device has potential applications in photodetectors, active optoelectronic devices, sensors, and other related fields.

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Section: Introductionmentioning

confidence: 99%

Design of a Penta-Band Graphene-Based Terahertz Metamaterial Absorber with Fine Sensing Performance

Lai,

Chen,

Zhou

et al. 2023

Micromachines

View full text Add to dashboard Cite

show abstract

“…And the radio frequency (RF) blackout will occur in severe cases [2]. In order to alleviate and even solve the RF blackout problem, scientists have conducted extensive research and proposed a series of methods [3][4][5][6]. Among them, terahertz communication is considered as potential solution with engineering feasibility due to its high-frequency performance and the rapid development of terahertz sources [7][8].…”

Section: Introductionmentioning

confidence: 99%

Plasma and Terahertz-Wave Propagation Characteristics in Atmospheric-Pressure Plasma Jet Under Different Operating Conditions

Ouyang

Liu

Mao

et al. 2023

IEEE Trans. Antennas Propagat.

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High density plasma source device is of great significance for ground experiment verification of vehicle reentry communication. APPJ, as a high-density plasma source, has received little attention in ground experiments on vehicle communications. In this paper, terahertz wave propagation characteristics in APPJ are investigated by joint simulation of APPJ discharge and terahertz transport model and related experimental measurements. THz-IF system is used to diagnose the electron density and terahertz transmission characteristics of APPJ for the first time, and the measured results are in good agreement with simulation results of joint simulation model in this paper and measured results of THz-TDS system of other researchers. Sheath thickness and electron density produced by self-designed APPJ are highly matched with the plasma sheath environment of HIFIRE-5b vehicle. Further analysis of the influence of different voltages and needle electrode radius on the terahertz transmission characteristics shows that the absorption effect plays a major role in terahertz wave attenuation in APPJ, and contribution of collision effect almost disappears, which is completely consistent with the phenomenon observed in HIFIRE-5b vehicle. The joint simulation model and THZ-IF method developed in this paper are of great significance for the ground test verification of reentry communication schemes.

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Difference analysis in terahertz wave propagation in thermochemical nonequilibrium plasma sheath under different hypersonic vehicle shapes

Ouyang

2023

Chinese Journal of Aeronautics

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Analysis of terahertz wave penetration capacity to 2D conductive cylinder coated with steady-state parabolic distribution plasma media

Cited by 6 publications

References 25 publications

Design of a Penta-Band Graphene-Based Terahertz Metamaterial Absorber with Fine Sensing Performance

Design of a Penta-Band Graphene-Based Terahertz Metamaterial Absorber with Fine Sensing Performance

Plasma and Terahertz-Wave Propagation Characteristics in Atmospheric-Pressure Plasma Jet Under Different Operating Conditions

Difference analysis in terahertz wave propagation in thermochemical nonequilibrium plasma sheath under different hypersonic vehicle shapes

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