FDTD 101: Introduction to perfectly matched layer (PML)

Lecture 6: Introduction to perfectly matched layer (PML)

Perfectly matched layer (PML) is commonly used to truncate unbounded computational region, since an ideal PML can completely absorb the incoming waves from all angles of the incidence without any reflection. In this lecture, we explain the basic idea behind PML, and show how to characterize the performance of PML.

- Explain the concept of PML through coordinate transformation.
- Show that the performance of PML should be characterized by the amplitude rather than the intensity of parasitic reflection, and present a simple approach to compute parasitic reflection at many frequencies.
- Illustrate typical signature in the spectrum when the parasitic reflection at the boundary is significant.

For Python setup used in this lecture, please see related FDTD Python Tutorial below.

Download .ipynb file HERE View Presentation Slides HERE
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