Extinction efficiency and scattering asymmetry of a PEMC sphere illuminated by vortex electromagnetic waves

被引：5
作者：
Arfan, M. [1 ]
Ghaffar, A. [1 ]
Alkanhal, Majeed A. S. [2 ]
Khan, Y. [2 ]
Alqahtani, Ali H. H. [3 ]
Shakir, I. [4 ]
机构：
[1] Univ Agr Faisalabad, Dept Phys, Faisalabad, Pakistan
[2] King Saud Univ, Dept Elect Engn, Riyadh, Saudi Arabia
[3] King Saud Univ, Coll Appl Engn, Dept Elect Engn, Al Muzahimiyah Branch, Riyadh, Saudi Arabia
[4] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA USA
来源：
OPTICAL AND QUANTUM ELECTRONICS | 2023年 / 55卷 / 10期
关键词：
Scattering; VEM wave; OAM; PEMC; Metamaterials; Extinction efficiency; Scattering asymmetry; ORBITAL-ANGULAR-MOMENTUM; TRANSFORMATION;
D O I：
10.1007/s11082-023-05156-2
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This study examines the scattering of the orbital angular momentum (OAM) carrying wave by perfect electromagnetic conductor (PEMC) sphere. The incident and scattered electromagnetic fields are expressed using vector spherical wave functions (VSWFs) and unknown field coefficients. A relation between the incident and scattered field coefficients is formulated by implementing the appropriate boundary conditions (BCs) at the surface of the PEMC sphere. Expressions related to the extinction efficiency and scattering asymme-try parameter are derived and computed. The influences of the size parameter of the sphere and the beam waist radius are analyzed. To check the convergence of the proposed work, the numerical results of the scattering efficiency for the vortex electromagnetic (VEM) wave (l = 1) and plane wave (l = 0) for the PEMC sphere are calculated and found to be satisfactory. This investigation provides sufficient information for exploring the electro-magnetic scattering mechanism in the OAM domain regarding metamaterial structures.
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页数：12
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