Coding graphene metasurface modeling using MoM‐GEC method for dynamic diffusion and scattering control at Terahertz range. Issue 9 (18th June 2020)

• Record Type: Journal Article
• Authors: Soltani, Imen; Soltani, Takoua; Aguili, Taoufik
• Is Part Of: International journal of RF and microwave computer-aided engineering. Volume 30:Issue 9(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-06-18
• Subjects: coding metasurface -- graphene -- MoM‐GEC -- scattering -- terahertz; Microwave devices -- Computer-aided design -- Periodicals; Computer-aided engineering -- Periodicals; 621.3813
• DOI: 10.1002/mmce.22336
• Languages: English
• ISSNs: 1096-4290

Abstract

Abstract: In this article, we present an electromagnetic study of electrically programmable graphene‐based metasurface with individual scattering control. Our investigation is based on the method of moments combined with the generalized equivalent circuit (MoM‐GEC) approach. We show that, tuning the unit cell's conductivity leads to change its input impedance and scattering matrix. So, each unit cell of the metasurface exhibits' a dynamic phase response that can be switched between 0° and −180° by controlling high transmission and total reflection states. Based on this feature, a 1‐bit coding metasurface consisting of discrete codes of "0" and "1" is used to synthesis 3D beams. Hence, tailorable anomalous reflection and diffusion are studied under normal incidence at a fixed frequency of 3.9 THz. This survey opens new opportunities in the domain of Terahertz beam engineering and security scanner applications.