Fig. 5
From: Manipulating light transmission and absorption via an achromatic reflectionless metasurface
Experimental characterizations on two series of metasurfaces with varying NF and FF couplings. a Calculated value of ξ = |X − iκ| (color map) versus κ and θX, with points labeled with #1–8 representing those shown in Fig. 4d-e. b-c LEM-calculated κ and θX for two series of samples. d Spectra of reflectance/transmittance of samples #1–4 with top-view SEM pictures (scale bars: 500 nm) shown in the right panel, obtained by experiments (stars), simulations (circles) and CMT calculations (solid lines) with parameters computed by the LEM theory, respectively. Here the bumps in d marked by blue dotted lines are SiO2 bumps stemming from the deposition process corresponding to the location of the bottom resonators. e Spectra of reflectance/transmittance of samples #5–8 with side-view FIB-SEM pictures (scale bars: 500 nm) shown in the right panel, obtained by experiments (stars), simulations (circles) and CMT calculations (solid lines) with parameters computed by the LEM theory, respectively. Dotted lines and shaded areas in d-e represent the resonance frequencies and radiation damping of the hybrid modes calculated with the LEM theory, respectively, while the dotted-line rectangles in the sample images denote the positions of two bars. Here, κ and X are scaled by \(\sqrt{\Gamma_{1r}{\Gamma}_{2r}}\)