FEM Approach to the Robust Design of a Graphene-Based 3D Structure for THz Devices

In this work, we propose the investigation of the terahertz performance of a graphene-based multilayer metasurface, assessing the reflection and absorption capability of the considered structure in the view of designing a robust passive device for the manipulation of THz radiation. In particular, we...

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Published in2021 IEEE 16th Nanotechnology Materials and Devices Conference (NMDC) pp. 1 - 4
Main Authors Kuzhir, Polina, La Mura, Monica, Lamberti, Patrizia, Paddubskaya, Alesia, Tucci, Vincenzo, Vanyukov, Viatcheslav
Format Conference Proceeding
LanguageEnglish
Published IEEE 12.12.2021
Subjects
Absorption
FEM modeling
graphene
metamaterial
metasurface
Nonhomogeneous media
Sensitivity
Silicon compounds
Solid modeling
Surface waves
Terahertz
Three-dimensional displays
THz absorber
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Summary:In this work, we propose the investigation of the terahertz performance of a graphene-based multilayer metasurface, assessing the reflection and absorption capability of the considered structure in the view of designing a robust passive device for the manipulation of THz radiation. In particular, we develop a Finite Element Method (FEM)-based model of a patterned SiO 2 /gold/PMMA/graphene/PMMA multilayer device and use it to assess the electromagnetic response in the THz frequency range of the proposed metamaterial. The structure has a SiO 2 substrate, patterned with straight grooves and covered by a nanometric thin film of gold. On top of the cavities is a PMMA/graphene/PMMA sandwich layer. By considering an incident wave on the top surface, the absorption enhancement provided by the addition of the graphene layer is assessed. Further, the impact of the patterning layout, i.e. the grooves' height variation, on the THz power transmission, reflection, and absorption of normally incident EM waves is investigated. The FEM model provides the ideal tool for the assessment of the device sensitivity to the design parameters, allowing the design centering in the most robust nominal solution.
DOI:10.1109/NMDC50713.2021.9677563