Reply To: which problem in simulation leads to absorption over 1 in photonic solar cells in FDTD?

[Guilin Sun]

Sorry, it is by chance! The autoshutoff min should not be increased except you have a strong reason. It is used to evaluate the residual energy left inside the simulation volume. When it is small, we can in general say that the frequency-domain result is accurate, since we get the cw result by Fourier transforming the signal.
If the absorption is significantly larger than 1, say 1.2, then most likely it is due to shorter simulation time. Please follow the previous suggestions, in particular the simulation time can be significantly increased and use the autoshutoff min (and checkpoint) to terminate the result.
Please refer
Simulation time and frequency domain monitors
Transmission efficiency greater than 1?