Large-scale reflective optical Janus color materials

摘要

In this work, a new hybrid optical Janus color architecture is introduced that can lead to impressive, highly directional optical properties. Based on a simple and straightforward annealing process, a thin metallic nanoparticle metasurface is produced, which forms a strong light absorption layer and creates optical Janus effects in a multilayer structure. The observed reflective color is remarkably different on one side of the structurally colored material than that obtained on the other side. The optical properties of the systems under different geometric and compositional situations are performed. The asymmetric color materials could hold broad application prospects such as displays, color filters, architecture, and anti-counterfeit labels.