Abstract
Propagation characteristics of oblique incident terahertz wave from the nonuniform dusty plasma are studied using the propagation matrix method. Assuming that the electron density distribution of dusty plasma is parabolic model, variations of power reflection, transmission, and absorption coefficients with frequencies of the incident wave are calculated as the wave illuminates the nonuniform dusty plasma from different angles. The effects of incident angles, number density, and radius of the dust particles on propagation characteristics are discussed in detail. Numerical results show that the number density and radius of the dust particles have very little influences on reflection and transmission coefficients and have obvious effects on absorption coefficients. The terahertz wave has good penetrability in dusty plasma.
Highlights
Dusty plasma is a kind of ionized gas mixed with dust particles, and it is called complex plasma
Numerical results of the power reflection, transmission, and absorption coefficients are given, and the effects of incident angles, density, and radius of dust particles are analyzed in detail
For the dusty plasma that has the same number density of dust particles, as the radius of a dust particle increases, reflection coefficients change little; transmission coefficients change significantly in the range of 0.05–0.3 THz; and absorption coefficients decrease with the increasing of the dust particle radius
Summary
Dusty plasma is a kind of ionized gas mixed with dust particles, and it is called complex plasma It exists in space environment widely, such as the interstellar cloud, planetary ring, and planetary magnetosphere, as well as in the fields of semiconductor science and materials science. Dust particles in dusty plasma affect the electromagnetic environments of near-earth’s space and may cause important effects on space communications system. The propagation characteristics of terahertz wave in dusty plasma will play an important role in the further analysis of dusty plasma effects on airground communication and may provide some theoretical basis for the dust particles pollution processing in the semiconductor laboratory. Li et al [11] studied the propagation characteristics of THz wave propagation in plasma sheath and discussed the effects of incident angles and plasma collision frequencies on transmission parameters. Numerical results of the power reflection, transmission, and absorption coefficients are given, and the effects of incident angles, density, and radius of dust particles are analyzed in detail
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