Alkhoori Hamad M, Alderei Noura N, Alshamsi Aryam S
United Arab Emirates University, Department of Electrical Engineering, Al Ain, United Arab Emirates.
Heliyon. 2024 Feb 28;10(5):e26835. doi: 10.1016/j.heliyon.2024.e26835. eCollection 2024 Mar 15.
Plane-wave scattering and absorption characteristics of a spherical core composed of an isotropic material, and covered by InSb spherical coating are investigated in the terahertz spectral regime. The InSb coating is subjected to a magnetostatic field; hence it is a gyrotropic, uniaxial dielectric material comprised of two parameters: temperature and magnetostatic field. It is seen that the interplay of these two parameters can modify the various scattering efficiencies, depending on (i) the frequency of the incident plane wave, (ii) the incident plane-wave orientation with respect to the magnetostatic field's direction, and (iii) the identity of the core material. In particular, for a fixed orientation of the incident plane wave, the impact of the temperature and the magnetostatic field on the total scattering and the backscattering efficiencies becomes more pronounced at higher frequencies, compared to lower frequencies. The absorption efficiency, on the other hand, is strongly dependent upon these two parameters, regardless of the frequency. On fixing the two parameters of InSb, the role of the orientation of the incident plane wave with respect of the magnetostatic field' direction emerges in some spectral regimes for the total scattering and absorption efficiencies, and in high-frequency spectral regimes for the backscattering efficiency. These hold true for dielectric core, as well as for conductive core.
研究了由各向同性材料构成、覆盖有锑化铟球形涂层的球形内核在太赫兹光谱范围内的平面波散射和吸收特性。锑化铟涂层处于静磁场中，因此它是一种旋光性单轴介电材料，由温度和静磁场两个参数组成。可以看出，这两个参数的相互作用会改变各种散射效率，具体取决于：(i) 入射平面波的频率；(ii) 入射平面波相对于静磁场方向的取向；(iii) 内核材料的特性。特别是，对于入射平面波的固定取向，与较低频率相比，温度和静磁场对总散射和后向散射效率的影响在较高频率下变得更加明显。另一方面，吸收效率强烈依赖于这两个参数，与频率无关。在固定锑化铟的两个参数时，入射平面波相对于静磁场方向的取向在某些光谱范围内对总散射和吸收效率以及在高频光谱范围内对后向散射效率产生影响。这些对于介电内核以及导电内核均成立。
