Dear meep users,
I started using meep only a few weeks ago. Before I did some bandgap-calculations using mpb, which worked fine. Currently I am trying to simulate transmission through a 3D woodpile structure with different amounts of layers. I’d like to compare my simulations with experimental data, so I’d need to get a transmission spectrum from about 3 µm up to 5.5 µm wavelength. Using mayavi2 I checked my structure and it seems to be correct. I added pml in the size of one wavelength and I placed my source and flux plane far away from the structure. The simulation result I get is not at all what I expected, because I get transmission of zero for almost all values except for some frequencies in between. My expected result would have been a transmission close to one at most frequencies and to observe a bandgap depending on the distance between rods. I’d also need a thin layer of gold on top of the structure, which I tried to realize by making elliptic gold structures 15nm bigger than the underlying dielectrics and placing them prior to placing the dielectric structure. As soon as I add gold layers the simulation runs for days (I cancelled after 6 days) and was not even finished. I am running meep in a virtual box on a windows i7 computer, where it has 4 cores and 2.5 GB ram to use. I attached my code to the mail, could you please tell me what I did wrong in my control file. Best Regards, Lorenz Herrmann
transmission.scm
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