Reply To: problem in the situation of inclined incidence with plane wave source

[Guilin Sun]

Since the incident angle is 80 deg, you may need to check if there is any higher order diffraction that creates close to 90 deg orders. In addition, not only PML, but also the source injection can have errors. I would suggest

1: use 48 or 64 layers of PML

2: use smaller autothustoff min, eg, 1e-6 or smaller

3: use longer simulation time to let the autoshutoff min to terminate the simulation.

4: set the source in time domain with pulse length 50fs and off 100fs, or 100fs/200fs. This is because the injected pulse is still broadband, and other wavelength may have resonance. Please use a time monitor and check if there is resonance at other wavelength.

Large incident angle simulation is challenge.