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workshop-invdesign's Issues

Is auto-differential the same as adjoint method?

Very good tutorial. It's amazing that the inversely designed structure with such non-intuitive structures can realized these optical functionalities. In your implementation, it seems that you simply use auto-differential to track all the operations dealing wtih the design parameters (epsilon distribution), including the FDFD simulation, and backpropagate to find the derivatives. How is this connected to adjoint method? In the slides, you mentioned adjoint equation is setup similar to the EM simulation but with different source. Where is the adjoint equation in your implementation?

How can I change the frequency values between input source and the output probe?

In your second tutorial notebook, I want to change the frequencies of the source and probe. First I want to simply change the 'Omega' parameter in the 'insert_mode' function, but that does not work. The function seems only return the mode information of source and probe. I am new in the inverse design and it can be very helpful if you can give me some suggestions.

Many thanks.

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