Schematic illustration of the tri-channel metasurface for watermarked structural-color nanoprinting and holographic imaging. Nanobricks with different sizes and orientations are arranged on the transparent substrate. By changing the illuminating condition and outgoing polarization of light, three types of images can be produced with the simple metasurface. Under the irradiation ...
View more: Metasurface engineered to create three different images depending on illumination