Abstract
Colors are carriers of information, and two-way structural colors of transmission and reflection can be used to convey significantly more information. Herein, using numerical analysis, we demonstrate metasurfaces capable of simultaneously transmitting and reflecting different colors. The low-loss hybrid Mg–TiO2 structures and transparent substrate result high saturation and wide gamut transmitted colors and complementary reflected colors. Besides, the dynamic display is possible with the hydrogen-storage metal Mg. Through simulations, we studied the potential of the proposed metasurfaces for applications, such as nanoprintings and encrypted watermarks. We expect the results of this work to be applicable to double-sided displays, anti-counterfeiting, information coding, and high-density optical data storage.
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