Work

The dispersion of terahertz signals propagating in a hypersonic plasma sheath under a time-varying magnetic field

Year: 2025

Type: article

Abstract: This paper investigates the dispersion relation of terahertz waves propagating in a hypersonic plasma sheath under a low-frequency, time-varying magnetic field. A theoretical model is developed, deriving an effective dielectric tensor and modified dispersion relations for the Ordinary (O) and Extraordinary (X) modes. An analysis reveals that the magnetic field significantly alters the X-mode dispersion, introducing an effective gyrofrequency ωc/2 that reduces wave attenuation, particularly in high-density plasmas. In contrast, the O-mode remains unaffected. This study demonstrates that manipulating the dispersion relation via a time-varying magnetic field provides a viable mechanism for mitigating communication blackout.

Source: AIP Advances

DOI: 10.1063/5.0302783

Authors: YiMing Zou, Junyi Zhang, Kai Yuan, Ziyang Zhao

Institution: Nanchang University

Language: English

Topic: Plasma Diagnostics and Applications

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,350

Funder: National Natural Science Foundation of China