Stability-Improved ADE-FDTD Method for Wideband Modeling of Graphene Structures

A stability-improved auxiliary differential equation finite-difference time-domain (FDTD) method is developed for broadband modeling graphene-based devices in this letter. By introducing an electric polarization term characterized with an auxiliary equation, the graphene sheet is incorporated into t...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2019-01, Vol.18 (1), p.212-216
Main Authors: Wang, Xiang-Hua, Gao, Jian-Yun, Teixeira, Fernando L.
Format: Article
Language:English
Subjects:
Auxiliary differential equation (ADE)
Broadband
Conductivity
Differential equations
Electric polarization
Finite difference methods
Finite difference time domain method
finite-difference time domain (FDTD)
Graphene
Mathematical model
Mathematical models
Numerical stability
split-ring resonator (SRR)
Stability analysis
Structural stability
Time domain analysis
wideband
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Summary:A stability-improved auxiliary differential equation finite-difference time-domain (FDTD) method is developed for broadband modeling graphene-based devices in this letter. By introducing an electric polarization term characterized with an auxiliary equation, the graphene sheet is incorporated into the FDTD method without any decrease in the Courant-Friedrich-Levy number. The stability condition is analyzed and numerical experiments are carried out to validate the proposed method with analytical results. It is further applied to investigate some properties of metal-graphene split-ring resonator.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2018.2886335