momchil-flex

> This reminds me- Do field and tensor elements always/usually live on the Yee lattice in frequency domain solvers (like the mode solver)?. I thought the Yee lattice was needed...

Thanks! So this was giving NaNs at first, I believe something to do with mismatch of various grids on which things are computed. However I fixed it in a way...

> Using the native modal `.flux` is much cleaner than my previous attempt. I'm not sure that attribute existed when I tried this. How is that calculated? It's good news...

> Thanks that all makes sense. I will check/fix the normalization today so the fraction of integrals is actually the group index. I know I figured it out in the...

Should we close this? And/or reopen another issue about supporting thin lens approximation?

Hi @nkvij , do you also need our `ResonanceFinder` to be differentiable and not just the `FieldTimeMonitor`? Because that's another thing that's not even on the map yet. By the...

Is this meant to be ready @magiWei @lei-flex

Note that tests are failing @QimingFlex . Otherwise not sure what comments @lei-flex had on the code and if they are resolved.

Sorry @QimingFlex I keep tagging you when I mean Qingeng (@magiWei )

> @tylerflex @momchil-flex I have rebased the pre/2.8 to my branch, but the UT also fails, I don't know what happened, the error: > > `Error: Submodule docs/faq is not...