2D-Broadband Absorption Metasurface Unicells Dataset for Predicting Optimum Structures for Tandem Solar Cells

2D images of metasurface unit cell shapes and their design parameters. The geometry of the resonator was cross, square, L-shaped, window-shaped polygon and their inverted version. The shapes were chosen because of the ease of fabrication by the lithography technique. The 2D-array images of these metasurfaces were generated in MATLAB. The mesh step size of 100nm was maintained in all three dimensions. Periodic boundary conditions were applied in x and y dimensions while PML condition was applied on the z-axis to absorb/ transmit maximum light with minimum reflection. Each shape was converted into a greyscale 40 x 40 x 1-pixel image. Each pixel contains the minimum feature size of 80nm which lies within the fabrication range.