Hello,
I chose to simulate metasurface designs in HFSS as it provided experimentally verified simulation results in the RF. Now, I want to expand my simulation range to cover the IR and visible regimes too.
When I'm doing this, the transmission values I am getting appear to include large amounts of thin film interference, which I do not see in my experimental results. I am using two periodic boundary conditions, floquet ports above and below (with 5um gap between my structure and port), custom materials based on conductivity values, and a driven solution mode. The maximum pitch of my periodc structures is 1mm. Do I need to take into account some other considerations when moving into the IR and visible regimes with HFSS?Â
In adition, the simulation time increases substationally when moving to the higher freuqnecies. I did expect this as the mesh size used will be smaller. I should note I am using three individual studies with the adaptive pass / meshing frequency set to the highest value in each study. Example: study 1 goes from 1-15 GHz and so adaptive pass frequency is 15 GHz. How could I ensure that I speed up simulations without losing out on accuracy?
Many thanks in advance, Tom.
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