Dear Danny, I am also very interested in using a non-uniform grid in my code. If I manage to do this I will provide further information. Please let me know if you have made any progress with your own code as well.
I am trying to simulate graphene plasmons for a nano-rectangle pattern 70nm x 65nm which I typically do with a BEM code but this time I need to include materials with anisotropic and possibly nonlinear properties which the BEM code cant handle. Hence I started using Meep which is overall an amazing simulation tool. Sadly since graphene plasmons are in the infrared range I am having troubles with the very high resolution due to the nanoscale dimensions of my structure combined with the large simulation region required due to the several micrometer scale wavelengths. I feel like if a non-uniform grid was included in Meep by default I would never look back towards commercial solutions. Saying that, I will try my best to get the scaling transformation running. Best wishes Nikolaos Matthaiakakis P.s I am not sure what you are working on but depending on your structure maybe an FEM solver would be more suitable (could be true for my case too). Sadly I am not familiar with any good quality free FEM tools that are suitable for lossy dispersive materials/anisotropic/nonlinear materials.
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