Guilin Sun
Ansys Employee

 

what is the total thickness ?is it also on the order of 100um? if so, FDTD can work but you may need a supercomputer. it may need hours for simulation. If you approximate it as a thin-film type, the analytical solution is much faster, within minutes. I personally would like to use the analytical solution,since only the edge part may not give the same contribution as the large central region, due to side wall reflection/refraction.

Please try to download FDTD, and run the analytical solution, as the scripts come with the software. You can also estimate the required memory under mesh accuracy 2 with FDTD so you will know more for the hardware. You have 30 days free trial.