Topology-optimized Metasurfaces

This dataset provides the 3D topology-optimized designs from the article “Topology Optimization of a Superabsorbing Thin-Film Semiconductor Metasurface”. These designs can be used to validate the results presented herein or to perform further numerical investigations. Since the designs are provided in STL format, they can be integrated into any electromagnetic solver that supports STL import (e.g., Lumerical).

Each STL file was generated by converting volumetric data extracted from the staggered 3D FDTD grid via interpolation (see Article 1, Section “FDTD Implementation and Design Export”). Because the FDTD spatial discretization is 4 nm (adapted from Article 2), the unit length in all STL files corresponds to 2 nm. All other information is contained in the name of the files: "a" is the periodicity, "t" is the thickness, and the spectrum labels refer to the different time signals under which the designs have evolved. The Lumerical.zip contains all the necessary files to reproduce our results presented in the article, Fig. 4; FieldData_Ridges.zip and FieldData_TopOpt_a400_t200.zip contain the full 3D electric and magnetic fields, Poynting vector, and dissipation profile for the wavelengths presented therein (as .mat-files).