Lumerical Fdtd Tutorial <PROVEN>

: If your geometry and source have mirror symmetry, apply these to cut your simulation volume—and computation time—by 50% or 75%.

The FDTD method is a numerical technique used to solve Maxwell's equations in the time domain. The basic idea behind FDTD is to discretize both space and time, dividing the simulation domain into a grid of cells and updating the electric and magnetic fields at each cell over time. The FDTD algorithm uses a simple and efficient approach to update the fields, making it suitable for large-scale simulations.

The simulation volume is too large, or the mesh size is set unnecessarily fine.

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Refine the mesh (Mesh Accuracy 3 or 4) or add a over small features.