Fig. 1 | Scientific Reports

Fig. 1

From: Multiband and bidirectional multiplexing asymmetric optical transmission empowered by nanograting-coupled defective multilayer photonic crystal

Fig. 1

The metamaterial composed of nanograting-coupled defective multilayer photonic crystal for multiband and bidirectional multiplexing AOT. (a) Three-dimensional schematic diagram and (b) the enlarged cross-section with geometric parameters. (c) The transmission spectra of the proposed AOT metamaterial illuminated from nanograting to defective PC (red-filled region) and from the defective PC to the nanograting (yellow-filled region). (d) The transmittance difference and contrast ratio of AOT metamaterial at specified peak wavelengths in three different transmission bands. The colors of the bar chart correspond to three peak wavelengths (518 nm: green region, 576 nm: yellow region, 624 nm: red region).

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