Simulation of Metagrating structures with floquet port

- October 16, 2023 at 7:20 am
  
  Mohith N Raate
  Subscriber
  
  We are working on a project related to design and analysis of metagratings. As a part of this we are trying to replicate the results of 2 research papers. We have constructed the structures mentioned in the papers using Ansys hfss and simulated them.
  
  The obtained results are not similar to the results present in the paper mentioned above. I am unable to comprehend the results and analyse the field distribtution. I request you to kindly help me out with the analysis of the obtained results.
- October 19, 2023 at 1:46 am
  
  Faezeh Ladani
  Ansys Employee
  
  Hi Mohit,
  One quick thing to check is the number of floquet modes you are using. The cell looks to be large and for that we would need more mode. Use Mode calculator in Floquet Port setup to check how many modes are needed. You can find more information about it in HFSS online help.
  You may instead use a PML boundary and use incident plane wave with the proper angles and proper scan angle for coupled boundary.
  Also, note that in comparison with a paper, it is important to do the exact simulation as they did. Usually not all the information is available in the paper. Check every step of what you did which was not exactly given in the paper. This may show where the differences are coming from.