IN →
P1 (1550nm)
P2 (1310nm)
Electromagnetic waves (1550nm) inject at left port and coherently scatter through inverse-designed silicon nanostructures, constructively interfering into Port 1.
In conventional photonics, directional couplers require hundreds of micrometers to split light modes. Inverse design compresses this geometry into a two point four micrometer square. Injecting fifteen fifty nanometer waves creates forward electromagnetic phase fronts across the grid. Clicking Run Adjoint Step computes phase gradients toward Port One, iteratively depositing high-index silicon pixels. After forty-five iterations, coherent sub-wavelength scattering yields eighty-two percent transmission into Port One with crosstalk suppressed below minus twenty-two decibels, exportable directly to fabrication masks.