thank you for your reply. I considered your suggestions and first I checked them using the Ring Resonator example (3.1micrometers radius), and I checked its simulation log, where I found that the autoshutoff criteria were satisfied.
Later I run my 10 micrometer simulation with a simulation time of 300000fs and the simulation has finished because the autoshutoff criteria has been satisfied, however the transmittance still is not good:
This is the end of the log file:
22% complete. Max time remaining: 9 hrs, 33 mins, 41 secs. Auto Shutoff: 2.66234e-005
23% complete. Max time remaining: 9 hrs, 26 mins, 15 secs. Auto Shutoff: 2.03237e-005
24% complete. Max time remaining: 9 hrs, 19 mins, 10 secs. Auto Shutoff: 1.40348e-005
Early termination of simulation, the autoshutoff criteria are satisfied.
Completed 1103251 iterations, or 7.37931e-011s of Simulation Time
Process 0 starting to collect data
collecting monitor data
collecting source data
Injecting in positive direction
Finished collecting data
Simulation completed successfully at: Fri Feb 19 00:50:24 2016
Overall wall time measurements in seconds:
time to mesh and initialize: 5
time to run FDTD simulation: 10863
time to finalize data and save to files: 2
FDTD solver speed: 12.6485 Mnodes/s
total FDTD solver speed on 4 processes: 50.5942 Mnodes/s
I have used a mesh of 2 in order to reduce the simulation time and also have used stabilized PML with 42 layers (standard was crashing). Do you think the result is not good because of the mesh? I’m using a mesh override region in the gap:
msh_n = 5;
set(“set equivalent index”,1);
set(“equivalent x index”,msh_n);
set(“equivalent y index”,msh_n);
set(“equivalent z index”,msh_n);
I also have noticed when recording a movie that the wave propagates through the straight waveguide and, part of the wave reflects from the output port. Should I use more layers in the PML? is this the reason why the transmittance is not fine? (it reflects as well in the 3.1micrometer example).
Or, should I still reduce the min autoshutoff, let’s say to 1e-7?
Thank you for your help