I am trying to simulate a one dimensional photonic crystal cavity with FDTD boundary conditions as below:
I am getting Q factor of
Q = 90546.2 +/- 43.9683
at 190.178THz, or 1576.38 nm
But autoshutoff level reaches till only 0.472184.
The Q factor and resonance wavelength is approximately what I want, but not sure if the simulation has run correctly or not as autoshuttoff should be around 10^-5. I have used high Q analysis group for Q factor calculation. and I have set simulation time of 50,000 fs. So, is the calculation correct??
Please suggest how to reduce the autoshuttoff level. Or can I assume my simulation is correct
If you can give any advice, it would of great help to me.