A Simple Sub-Grid Scheme Using Space-Time Finite Integration Method

作者：Matsuo Tetsuji^*; Shimoi Tomohiro; Kawahara Jun; Mifune Takeshi

来源：IEEE Transactions on Magnetics, 2015, 51(3): 7201904.

DOI：10.1109/TMAG.2014.2360882

• Finite integration (FI) method
• optical-device analysis
• space-time grid
• sub-grid

A simple and stable sub-grid scheme is derived from the space-time finite integration method, where staircase-shaped edges can be used to construct a rectangle-based grid. Comparison with classical sub-grid methods shows that the proposed method suppresses unphysical wave reflection without interpolation of field values for the sub-grid connection. No numerical instability was observed even after 106 time steps. The proposed method was applied to the computation of a photonic band gap.

• 出版日期2015-3