Learning Forum

[NAMHYEON HEO]

I'm currently trying to simulate the difference in transmittance as a function of the type of substrate material, and I'm repeatedly getting excessively fluctuating values for TRANSMISSION for materials with an imaginary part near zero, such as SIO2.
Is there any way to solve this problem?

[Devika Padmakumar Nair]

Hi NAMHYEON,

Tried increasing the simulation time?

The common cause is, the simulation time is not long enough, or the autoshutoff min is not small enough. Please significantly increase the simulation time, say 100 times more, and let the autoshutoff min to terminate the simulation and let me know the outcome. 

Thanks annd regards

 

 

[NAMHYEON HEO]

Thank you for your response.
I tried increasing the simulation time from 1000 to 100000 and decreasing the AUTO SHUTOFF LEVEL to 1E-06, but I still get similar results.

[Greg Baethge]

Hi NAMHYEON, these oscillations are not necessarily wrong: as your substrate has a finite thickness, you basically have a Fabry-Perot cavity. You can easily check this using the STACK solver (see stackrt script command)