Application of the symplectic finite-difference time-domain scheme to electromagnetic simulation

  • Authors:
  • Wei Sha;Zhixiang Huang;Xianliang Wu;Mingsheng Chen

  • Affiliations:
  • Key Laboratory of Intelligent Computing & Signal Processing, Anhui University, Hefei 230039, China;Key Laboratory of Intelligent Computing & Signal Processing, Anhui University, Hefei 230039, China;Key Laboratory of Intelligent Computing & Signal Processing, Anhui University, Hefei 230039, China;Key Laboratory of Intelligent Computing & Signal Processing, Anhui University, Hefei 230039, China

  • Venue:
  • Journal of Computational Physics
  • Year:
  • 2007

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Abstract

An explicit fourth-order finite-difference time-domain (FDTD) scheme using the symplectic integrator is applied to electromagnetic simulation. A feasible numerical implementation of the symplectic FDTD (SFDTD) scheme is specified. In particular, new strategies for the air-dielectric interface treatment and the near-to-far-field (NFF) transformation are presented. By using the SFDTD scheme, both the radiation and the scattering of three-dimensional objects are computed. Furthermore, the energy-conserving characteristic hold for the SFDTD scheme is verified under long-term simulation. Numerical results suggest that the SFDTD scheme is more efficient than the traditional FDTD method and other high-order methods, and can save computational resources.