Abstract
A wavelength-multiplexed metasurface for four-channel display is proposed in this paper benefiting from the orientation degeneracy implied in Malus’s law. We construct the meta-atom by placing two nanorods with different sizes on a substrate, which can achieve amplitude manipulation at different wavelengths. The wavelength-multiplexed metasurface composed of these meta-atoms can display four independent binary grayscale images at different wavelengths in the reflection space. Numerical simulations validate the proposed wavelength-multiplexed metasurface with the ability to record and project four independent binary grayscale images at two wavelengths. With the advantages of high capacity, the proposed wavelength-multiplexed display metasurface will pave a way for multi-channel applications in nano-display, information storage, optical anticounterfeiting, and other relevant fields.
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