Dual-wavelength multiplexing nanoprinting based on a single-sized metasurface

This is the authors' abstract. We don't add key points for this paper.

Metasurface-based nanoprinting has emerged as a promising technology for high-resolution image encoding. Conventional multi-wavelength nanoprinting strategies typically require nanostructures with diverse geometries, which introduces both design and fabrication complexities. In this work, we propose and experimentally demonstrate a dual-wavelength multiplexing nanoprinting platform via a single-sized metasurface. By exploiting the polarization- and wavelength-dependent response of anisotropic nanobrick at tailored orientation angles, we achieve independent amplitude manipulation at two distinct wavelengths while maintaining identical structural dimensions. We experimentally realize high-fidelity nano-printed patterns at different wavelengths with minimal crosstalk, and demonstrate their spectral robustness under broadband illumination. Compared to size-varied metasurfaces, our approach significantly simplifies both the design process and nanofabrication requirements while maintaining high operational flexibility. This work provides a robust and efficient pathway toward multi-wavelength metasurface devices, with potential applications in optical encryption, high-capacity information storage, and dynamic optical displays.