FDTD Simulation of Dispersive Metasurfaces With Lorentzian Surface Susceptibilities
| Autor: | Joao G. Nizer Rahmeier, Shulabh Gupta, Scott A. Stewart, Tom J. Smy |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Surface (mathematics)
General Computer Science Field (physics) electromagnetic metamaterials Physics::Optics 02 engineering and technology symbols.namesake Broadband Convergence (routing) 0202 electrical engineering electronic engineering information engineering General Materials Science Physics electromagnetic diffraction General Engineering Finite-difference time-domain method 020206 networking & telecommunications Finite-difference methods 021001 nanoscience & nanotechnology time-domain analysis metasurfaces Computational physics Fourier transform symbols lcsh:Electrical engineering. Electronics. Nuclear engineering computational electromagnetics 0210 nano-technology lcsh:TK1-9971 |
| Zdroj: | IEEE Access, Vol 8, Pp 83027-83040 (2020) |
| ISSN: | 2169-3536 |
| DOI: | 10.1109/access.2020.2992656 |
| Popis: | A Finite-Difference Time-Domain (FDTD) simulation of broadband electromagnetic metasurfaces based on direct incorporation of Generalized Sheet Transition Conditions (GSTCs) into a conventional Yee-cell region has been proposed for arbitrary wave excitations. This is achieved by inserting a zero thickness metasurface inside bulk nodes of the Yee-cell region, giving rise to three distinct cell configurations - Symmetric Cell (SC), Asymmetric Cell (AC) and Tight Asymmetric Cell (TAC). In addition, the metasurface is modelled using electric and magnetic surface susceptibilities exhibiting a broadband Lorentzian response. As a result, the proposed model guarantees a physical and causal response from the metasurface. Several full-wave results are shown and compared with analytical Fourier propagation methods showing excellent results for both 1D and 2D field simulations. It is found that the TAC provides the fastest convergence among the three methods with minimum error. |
| Databáze: | OpenAIRE |
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