New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

scaling factor for eigenmode adjoint source #2074

Closed

MarkMa1990 opened this issue May 16, 2022 · 1 comment

MarkMa1990 commented May 16, 2022

Hi,

I just tested the code "https://nbviewer.org/github/NanoComp/meep/blob/master/python/examples/adjoint_optimization/01-Introduction.ipynb", and for version 1.18.0, the gradients from adjoin method and finite difference match, for version 1.22.0, it requires 4 times extra scale to make the gradient match.

at meep/python/objective.py, line 99, the scale should be "scale *= 8" instead of "scale *= 2".

Can I ask where are these scale factor coming from? because of field FFT?

left figure, version 1.18.0, right, 1.22.0.

Collaborator

smartalecH commented May 17, 2022

See #1984.

smartalecH closed this as completed

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment