How do I export the final inverse design structure to GDS?

Date	Category
2023-12-21 23:19:25	Inverse Design

After performing adjoint inverse designs using the adjoint plugin, you can export the final structure to GDS files using the function .to_gds_file().

from tidy3d.plugins.adjoint.utils.penalty import RadiusPenalty

# Convert the final adjoint simulation to a regular one.
sim_final = sim_adj.to_simulation()[0]

# Export the final simulation to GDS.
sim_final.to_gds_file(fname="inverse_design.gds", z=0, permittivity_threshold=6, frequency=200e14)