High‐Performance Color Printing and Information Encryption Enabled by Silicon Carbide Metasurface

ABSTRACT Structural colors are central to high‐fidelity printing and advanced displays, offering durable and accurate reproduction of visual information. Metasurfaces provide a powerful route to customize such colors, yet most efforts have been limited to tuning one or two parameters of the hue–saturation–brightness (HSB) space. Achieving comprehensive, simultaneous, and polarization‐independent control of HSB remains a critical challenge. Here, we present an ultrathin monolithic silicon carbide (SiC) metasurface that enables independent and simultaneous modulation of the entire HSB color space, while also supporting robust optical information encryption. The metasurface realizes HSB color nanoprinting with chiaroscuro effects, facilitating the encoding of complex visual hierarchies. Moreover, by modulating the polarization state of incident light, two distinct images can be selectively revealed or concealed with minimal crosstalk. The device further achieves printing resolutions exceeding 10 000 pixels per inch (PPI), highlighting its potential for next‐generation displays, imaging systems, and secure data storage.