Domain Decomposition Scheme in Newmark-Beta-FDTD for Dispersive Grating Calculation

Authors

  • Sheng-Bing Shi School of Physics University of Electronic Science and Technology of China, Chengdu, 610054, China
  • Wei Shao School of Physics University of Electronic Science and Technology of China, Chengdu, 610054, China
  • Kai Wang School of Physics University of Electronic Science and Technology of China, Chengdu, 610054, China

Keywords:

Domain decomposition, extraordinary optical transmission (EOT), Newmark-Beta-FDTD, surface plasmons

Abstract

In this work, an efficient domain decomposition scheme is introduced into the unconditionally stable finite-difference time-domain (FDTD) method based on the Newmark-Beta algorithm. The entire computational domain is decomposed into several subdomains, and thus the large sparse matrix equation produced by the implicit FDTD method can be divided into some independent small ones, resulting in a fast speed lower-upper decomposition and backward substitution. The domain decomposition scheme with different subdomain schemes and different subdomain numbers is studied. With a generalized auxiliary differential equation (ADE) technique, the extraordinary optical transmission through a periodic metallic grating with bumps and cuts is investigated with the domain decomposition Newmark-Beta-FDTD. Compared with the traditional ADE-FDTD method and the ADENewmark- Beta-FDTD method, the results from the proposed method show its accuracy and efficiency.

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Published

2021-07-22

How to Cite

Sheng-Bing Shi, Wei Shao, & Kai Wang. (2021). Domain Decomposition Scheme in Newmark-Beta-FDTD for Dispersive Grating Calculation. The Applied Computational Electromagnetics Society Journal (ACES), 33(07), 718–723. Retrieved from https://journals.riverpublishers.com/index.php/ACES/article/view/9057

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