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A regularized adaptive spatial resolution technique for fast and accurate analysis of metal–dielectric crossed gratings

Nekuee, S. A. H ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1007/s10825-019-01311-9
  3. Publisher: Springer New York LLC , 2019
  4. Abstract:
  5. The application of regularized jump points has been proposed [Khavasi and Mehrany in Opt Commun 284(13):3211–3215, 6] as an adaptive spatial resolution (ASR) technique to improve the convergence of the Fourier modal method (FMM) in the analysis of one-dimensional periodic structures. We extend this approach to obtain the optical response of metal–dielectric crossed gratings, two-dimensional periodic structures with a high-contrast permittivity distribution. A metallic grid and a slab of split-ring resonators are analyzed using the proposed ASR technique, and the results compared with those obtained using the conventional ASR technique and FMM. The results show that, by adequately choosing the discontinuity points of the dielectric function in the new coordinates, the convergence speed and accuracy of the proposed ASR technique are further increased compared with the conventional ASR technique. © 2019, Springer Science+Business Media, LLC, part of Springer Nature
  6. Keywords:
  7. Adaptive spatial resolution ; Discontinuity point ; Metal–dielectric grating ; Image resolution ; Laser resonators ; Modal analysis ; Periodic structures ; Dielectric functions ; Dielectric grating ; Discontinuity points ; Fourier modal method ; Permittivity distributions ; Spatial resolution ; Split ring resonator ; Two-dimensional periodic structures ; Metals
  8. Source: Journal of Computational Electronics ; Volume 18, Issue 2 , 2019 , Pages 689-695 ; 15698025 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s10825-019-01311-9