Wang Lu, Wang Tao, Yan Ruoqin, Yue Xinzhao, Wang Huimin, Wang Yuandong, Zhang Jinyan
Opt Express. 2022 Feb 28;30(5):7299-7307. doi: 10.1364/OE.451040.
Metasurfaces with the capability of spectrum manipulation at subwavelength can generate structural colors. However, their practical applications in dynamic displays are limited because their optical performance is immutable after the fabrication of the metasurfaces. In this study, we demonstrate a color-tunable metasurface using numerical analysis. Moreover, we select a low-refractive-index dielectric material, SiN, which leaks the electric field to its surroundings. We investigate the potencial of these metasurfaces by simulations to achieve color-tuneable devices with encrypted watermarks. This modulation of colors can be applied to encrypted watermarks, anti-counterfeiting, and dynamic displays.
具有亚波长光谱操纵能力的超表面可以产生结构色。然而，它们在动态显示中的实际应用受到限制，因为超表面制造完成后其光学性能是不可改变的。在本研究中，我们通过数值分析展示了一种颜色可调的超表面。此外，我们选择了一种低折射率介电材料SiN，它会将电场泄漏到周围环境中。我们通过模拟研究这些超表面实现带有加密水印的颜色可调器件的潜力。这种颜色调制可应用于加密水印、防伪和动态显示。
