How do I create an adjoint parameterized level set optimization?

Date	Category
2023-12-21 22:43:05	Inverse Design

To create an adjoint parameterized level set-based optimization setup, you should use the design parameters as the control knots of a level set surface. Then, create a CustomMedium and set the permittivity values based on the zero level isocontour obtained from the level set surface. After that, include it in a Structure object.

Once the simulation is defined, you can use the web.run method to send the simulation to our servers and process the data as usual.

Lastly, use autograd.value_and_grad to both compute the objective function and the gradient with respect to the design parameters. The objective function gradients can then feed a gradient-based optimization algorithm to drive the inverse design process.

We highly recommend watching the Inverse Design lectures if you are new to the adjoint method. You can also go through this tutorial for an example on adjoint level set optimization.