Factors influencing electromagnetic scattering from the dielectric periodic surface

doi:10.1088/1674-1056/28/7/074101

Abstract

The scattering characteristics of the periodic surface of infinite and finite media are investigated in detail. The Fourier expression of the scattering field of the periodic surface is obtained in terms of Huygens's principle and Floquet's theorem. Using the extended boundary condition method (EBCM) and T-matrix method, the scattering amplitude factor is solved, and the correctness of the algorithm is verified by use of the law of conservation of energy. The scattering cross section of the periodic surface in the infinitely long region is derived by improving the scattering cross section of the finite period surface. Furthermore, the effects of the incident wave parameters and the geometric structure parameters on the scattering of the periodic surface are analyzed and discussed. By reasonable approximation, the scattering calculation methods of infinite and finite long surfaces are unified. Besides, numerical results show that the dielectric constant of the periodic dielectric surface has a significant effect on the scattering rate and transmittance. The period and amplitude of the surface determine the number of scattering intensity peaks, and, together with the incident angle, influence the scattering intensity distribution.

Keywords: periodic surface Floquet's theorem extended boundary condition method (EBCM) scattering cross section energy conservation

Received: 08 January 2019
Revised: 02 April 2019
Accepted manuscript online:

PACS:	41.20.Jb	(Electromagnetic wave propagation; radiowave propagation)
	41.20.-q	(Applied classical electromagnetism)

Fund:

Project supported by the National Natural Science Foundation of China (Grant Nos. 61571355, 61801349, and 61601355).

Corresponding Authors: Zhensen Wu
E-mail: wuzhs@mail.xidian.edu.cn

Cite this article:

Yinyu Wei(韦尹煜), Zhensen Wu(吴振森), Haiying Li(李海英), Jiaji Wu(吴家骥), Tan Qu(屈檀) Factors influencing electromagnetic scattering from the dielectric periodic surface 2019 Chin. Phys. B 28 074101

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Factors influencing electromagnetic scattering from the dielectric periodic surface

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