Abstract
Color printing based on stacked-films has attracted much attention due to its advantage in fabrication. It is still an open question regarding how to achieve full colors in flexible substrate for practical applications with low cost. In this paper, structural colors based on an asymmetric Fabry–Perot (F–P) cavity using two-layer stacked films are proposed, and vivid colors as cyan, magenta, yellow, and black are experimentally achieved in reflection by varying the thickness of the dielectric layer. Meanwhile, the proposed structural colors present a good angular tolerance of up to 45°, especially for TM-polarized incident light. Remarkably, the feasibility of this device fabricated on a flexible substrate is also experimentally investigated, wherein the reflective color is almost unchanged even the radius of curvature reaches up to 4 mm. Therefore, the device we proposed here can make significant contributions to various applications for color printing, flexible display, wearable electronic equipment, and other related fields with low cost.
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