Abstract
In this paper, the propagation properties of a terahertz (THz) wave in a collisional and inhomogeneous dusty plasma with a ceramic substrate and oblique angle of incidence are studied using the scattering matrix method. The influence of the various corresponding parameters, such as the frequency of the THz wave, angle of incidence, electron density, radius and density of the dust particles, and the collision frequency, on the absorbance and transmittance is calculated. The results of the simulation indicate that an increase in the wave frequency increases the transmittance and decreases the absorbance. Moreover, the absorbance of a THz wave in a dusty plasma with a ceramic substrate increases with an increase in the incident angle, maximum electron density, coefficient of steepness, density and radius of the dust particles, and collision frequency. These results provide an important theoretical basis for the problem of communication blackout between ground and spacecraft.
Highlights
The intense friction between the surface of an aircraft and the atmosphere results in the ionization of the air molecules around the aircraft, producing dust particles
The electromagnetic (EM) wave passing between the aircraft and the earth station will be absorbed by the dusty plasma [3], meaning that communication will be degraded and may even be interrupted, which is known as the “blackout problem” [4, 5]
In [8], the reflectance, transmittance, and absorbance of an EM wave propagating through an inhomogeneous, collisional, magnetized plasma were extensively studied. e differences between the effects of three electron density profiles, with uniform, parabolic, and double exponential distributions, on the propagation properties were compared. e angular spectrum expansion and the 4 × 4 transfer matrix method were applied by Li et al to investigate the reflection, transmission, and absorption of the vortex in an inhomogeneous and magnetized plasma slab [9]. e results proved that the parameters of the plasma have a significant impact on the magnitudes of the reflected and transmitted intensities and the distortion of orbital angular momentum states
Summary
The intense friction between the surface of an aircraft and the atmosphere results in the ionization of the air molecules around the aircraft, producing dust particles. To analyse the impact of dusty plasma on wave propagation, Cao et al used the propagation matrix method to study the propagation characteristics of THz waves in an inhomogeneous dusty plasma. The influence of various parameters, such as the wave frequency, incident angle, electron density, density and radius of the dust particles, and collision frequency, on the absorbance and transmittance is calculated using the scattering matrix method (SMM). E rest of this paper is organized as follows: in Section 2, we present a propagation model of a THz wave in an inhomogeneous and collisional dusty plasma with an oblique angle of incidence, which to the best of our knowledge has seldom been studied before.
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