Fig. 4: Optimization setup and experimental validation for Neuroshaper-designed nonlocal metasurfaces. | npj Computational Materials

Fig. 4: Optimization setup and experimental validation for Neuroshaper-designed nonlocal metasurfaces.

From: Shaping freeform nanophotonic devices with geometric neural parameterization

Fig. 4

a Schematic of the simulation setup showing a periodic silicon (Si) metasurface of thickness d on a silica (SiO2) substrate. b Evolution of the optimization process showing grayscale (red) and binary (blue) design regimes. The lower panels show the level set function (top), corresponding physical designs (middle), and transmission spectra (bottom) at different iterations. c, d Level set function and binary silicon structure for the optimized c single-dip and double-dip design. SEM images of the fabricated e single-dip and f double-dip devices. Simulated (top) and experimental (bottom) transmission spectra for the g single-dip and h double-dip devices.

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