Guilin Sun
Ansys Employee

terahertz band will definitely need much longer simulaiton time since the default is for optical frequency. For cavity, you can think the simulation needs 100 times of the light propagation from source to monitor due to multiple reflections, and let the autoshutoff min to terminate the simulation.

You can simply add a time monitor at the exit side. After simulation terminates, you can check the time signal with visualier: https://optics.ansys.com/hc/en-us/articles/360037222234-Using-the-data-visualizer-and-figure-windows

Another method is to check the progress percentage. If it terminates at 100% with the default autoshutoff min, it indicates the simulation time is not long enough.

 

There are some online videos in the EDU course, or in youtube that you can search and watch.