Ansys Learning Forum Forums Discuss Simulation Photonics Diverging FDTD for high power in nonlinear GaAs photonic crystal unsolvable Reply To: Diverging FDTD for high power in nonlinear GaAs photonic crystal unsolvable

Amrita Pati
Ansys Employee

Hi Jordi,

I see that you are already using a quite low dt stability factor and the issue is not due to PML. Is this a broadband simulation? Sometimes the fitting of some materials cause the instability. If it is a brodband simulation, can you try doing the simulation just for a single frequecy point and check if you still see the divergence?

Regards,
Amrita