Inverse Design

The adjoint method is an extremely powerful tool for photonics optimization, allowing gradient computation of a cost function in just two simulation steps, regardless of the number of free parameters. While powerful, its implementation can be quite complex. Tidy3D leverages the Autograd package to automatically differentiate a Tidy3D simulation using the adjoint method, making it straightforward to implement adjoint optimization techniques. This section introduces the adjoint method and the inverse design plugin and provides a comprehensive list of application examples.

• Inverse design plugin
• Inverse design quickstart
• Autograd, automatic differentiation, and adjoint optimization: basics
• Adjoint analysis of a multi-layer slab
• Inverse design optimization of a mode converter
• Multi-objective adjoint optimization
• Inverse design optimization of a waveguide taper
• Inverse design optimization of a compact grating coupler
• Inverse design optimization of a metalens
• Adjoint-based shape optimization of a waveguide bend
• Adjoint optimization of a wavelength division multiplexer
• Inverse design optimization of a plasmonic nanoantenna metasurface
• Inverse design optimization of a bilayer grating coupler
• Adjoint optimization of an integrated bandpass filter
• Inverse Design of a Waveguide Bend