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Analytical Design of Tunable Multi-band Terahertz Absorber Composed of Graphene Disks by Mohammad Biabanifard; Somayyeh Asgari; Sadegh Biabanifard; Mohammad Sadegh Abrishamian is a Engineering article available to read on EtoBox.
What is Analytical Design of Tunable Multi-band Terahertz Absorber Composed of Graphene Disks about?
In this paper, the periodic arrays of multi-layer graphene disks placed near a metallic ground coated by dielectric spacers are proposed and analyzed by the Circuit Model (CM) based on the reflected fields to predict the perfect absorption response in the terahertz (THz) region. As numerical examples, single-, dual-, and triple-band absorbers with perfect absorption at three different THz frequencies are designed and proposed. The design is done by usage of a simple MATLAB code analytically and the numerical results are obtained by the Finite Element Method (FEM) to verify the accuracy and validity of the CM approach. The metallic ground restricted the transmission of the incident wave and all incident electromagnetic wave is confined between graphene disks and the metallic ground. As a result, a narrowband perfect absorption peak with full width at half maximum (FWHM) of ̃0.1 THz is obtained. The position of the absorption peak and also the number of peaks could be altered by control of the chemical potential of graphenes, indicating the tunability of the proposed structure. This structure supports the fabrication of THz devices such as optical filters, sensors, and active THz me
Who reads Analytical Design of Tunable Multi-band Terahertz Absorber Composed of Graphene Disks?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Mohammad Biabanifard; Somayyeh Asgari; Sadegh Biabanifard; Mohammad Sadegh Abrishamian
- Publisher
- Elsevier BV
- Published
- 2019
- Language
- EN
- Field
- Engineering (Physical Sciences)