LOD-FDTD方法的误差控制方案

IF 1.8 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2022-06-10 DOI:10.1109/JMMCT.2022.3181568

Tasuku Nakazawa;Di Wu;Seiya Kishimoto;Jun Shibayama;Junji Yamauchi;Shinichiro Ohnuki

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引用次数: 1

摘要

隐式局部一维时域有限差分（LOD-FDTD）方法可用于设计等离子体激元器件和波导结构。隐式LOD-FDTD方法通过使用大的时间步长，可以减少计算时间；然而，这涉及到准确性的权衡。为了克服这种折衷，我们为LOD-FDTD方法提出了一种误差可控的方案，其中采用快速拉普拉斯逆变换从复频域中的电磁场生成任意时域中的电磁场。与传统的LOD-FDTD方法相比，我们的方案提供了更高的精度和更有效的计算。

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Error-Controllable Scheme for the LOD-FDTD Method

The implicit locally one-dimensional finite-difference time-domain (LOD-FDTD) method is useful for designing plasmonic devices and waveguide structures. By using a large timestep size, the implicit LOD-FDTD method can reduce the computational time; however, this involves a trade-off with accuracy. To overcome this trade-off, we propose an error-controllable scheme for the LOD-FDTD method, wherein the fast inverse Laplace transform is employed to generate the electromagnetic field in arbitrary time domain from that in complex frequency domain. Compared to the conventional LOD-FDTD method, our scheme provides higher accuracy with more efficient calculations.

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来源期刊

IEEE Journal on Multiscale and Multiphysics Computational Techniques Mathematics-Mathematical Physics

CiteScore

4.30

自引率

0.00%

发文量