Enhancing efficiency of electromagnetic simulation in time domain with transformation optics

Jian Shiung Hong, Wei Ming Cheng, Meng Chang Yang, Ruei Cheng Shiu, Yung Chiang Lan, Kuan Ren Chen

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


With sub-wavelength scaled structures in a large system, the conventional finite-difference time-domain method can consume much computational resources since it includes both the spatial and temporal dimension in the scheme. In order to reduce the computational cost, we combine the novel methodology "transformation optics" in the simulation to map a physical coordinate with designated non-uniform grids to a uniform numerical coordinate. For a demonstration, the transmission spectrum through a sub-wavelength metallic aperture with one-dimensional and two-dimensional coordinate transformation is simulated, and compared with uniform-grid cases. We show that the proposed method is accurate, and the computational cost can be reduced remarkably to at most 5.31%, in comparison with the simulation of the finest uniform grids demonstrated. We are confident that it should be helpful to the simulation study in sub-wavelength optics due to its verified accuracy and efficiency.

Original languageEnglish
Article number1133
JournalApplied Sciences (Switzerland)
Issue number7
Publication statusPublished - 2018 Jul 12

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Instrumentation
  • General Engineering
  • Process Chemistry and Technology
  • Computer Science Applications
  • Fluid Flow and Transfer Processes


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