Zhang Zhaojian, Du Te, Jiang Xinpeng, Chen Huan, Zhang Zhenfu, He Xin, Yu Yang, Yang Junbo
Opt Express. 2024 Sep 9;32(19):33053-33063. doi: 10.1364/OE.533426.
Structural colors have seen rapid development in recent years, yet two-dimensional (2D) materials have seldom taken center stage as pixel materials. In this study, we propose a novel approach utilizing the emerging 2D material borophene, wherein resulting metasurfaces can generate plasmonic structural colors with tunability and ultra-high resolution. Numerical investigations demonstrate that borophene metasurfaces support visible localized surface plasmon resonances at deep subwavelength scales under linear-polarized light excitation, thus enabling the realization of structural colors with an unparalleled resolution of up to 10 dots per inch (dpi)-an advancement of one order of magnitude over conventional counterparts. Furthermore, by modulating the electron density of borophene, these structural colors can be dynamically tuned across a broad spectrum. We highlight their high robustness against incident light angles and explore the influence of periodicity and polarization angle on color rendition. Finally, we present their potential applications in optical anti-counterfeiting, encryption, and switchable imaging methodologies. This work may promise future advancements in ultracompact, tunable, and lightweight display technologies.
近年来，结构色发展迅速，但二维（2D）材料很少作为像素材料成为焦点。在本研究中，我们提出了一种利用新兴二维材料硼烯的新颖方法，由此产生的超表面能够产生具有可调性和超高分辨率的等离子体结构色。数值研究表明，硼烯超表面在线偏振光激发下，在深亚波长尺度上支持可见的局域表面等离子体共振，从而能够实现高达每英寸10点（dpi）的无与伦比的分辨率的结构色——比传统同类产品提高了一个数量级。此外，通过调节硼烯的电子密度，这些结构色可以在很宽的光谱范围内动态调谐。我们强调了它们对入射光角度的高鲁棒性，并探讨了周期性和偏振角对色彩再现的影响。最后，我们展示了它们在光学防伪、加密和可切换成像方法中的潜在应用。这项工作可能为超紧凑、可调谐和轻量化显示技术的未来发展带来希望。
