Efficient Wideband Numerical Simulations for Nanostructures Employing a Drude-Critical Points (DCP) Dispersive Model

Scientific Reports
Qiang RenDouglas H Werner

Abstract

A highly efficient numerical approach for simulating the wideband optical response of nano-architectures comprised of Drude-Critical Points (DCP) media (e.g., gold and silver) is proposed and validated through comparing with commercial computational software. The kernel of this algorithm is the subdomain level discontinuous Galerkin time domain (DGTD) method, which can be viewed as a hybrid of the spectral-element time-domain method (SETD) and the finite-element time-domain (FETD) method. An hp-refinement technique is applied to decrease the Degrees-of-Freedom (DoFs) and computational requirements. The collocated E-J scheme facilitates solving the auxiliary equations by converting the inversions of matrices to simpler vector manipulations. A new hybrid time stepping approach, which couples the Runge-Kutta and Newmark methods, is proposed to solve the temporal auxiliary differential equations (ADEs) with a high degree of efficiency. The advantages of this new approach, in terms of computational resource overhead and accuracy, are validated through comparison with well-known commercial software for three diverse cases, which cover both near-field and far-field properties with plane wave and lumped port sources. The presented work...Continue Reading

References

Nov 10, 2006·The Journal of Chemical Physics·P G EtchegoinM Meyer
Aug 20, 2007·Optics Express·Sergey I Bozhevolnyi, Thomas Søndergaard
Dec 10, 2009·Optics Express·David WoolfFederico Capasso
May 3, 2014·Optics Express·Christoph MenzelThomas Pertsch
Mar 11, 2015·Scientific Reports·Seyedmohammad A MousaviNikolay I Zheludev
May 15, 2015·Optics Express·Antonino Calà LesinaLora Ramunno
Oct 2, 2015·Scientific Reports·Linhan Lin, Yuebing Zheng

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Software Mentioned

FEKO AEDT DGTD
FEKO
ANSYS Electronics Desktop ( AEDT )
AEDT
DGTD
FEKO AEDT
COMSOL multiphysics

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