Plasmonic nanostructures or metasurfaces have recently been actively researched for structural color generation. Controlling the plasmonic resonant wavelengths of surface plasmon polaritons excited along the metal dielectric interfaces, arising from the resonant interaction with incident electromagnetic waves, reflection or transmission color can be effectively tuned in the visible wavelength region. However, the plasmonic structures are conventionally fabricated by electron beam lithography or focused ion beam, both so expensive and unproductive that they are not practical for large-scale production. In this report, we demonstrate a simple plasmonic nanostructure for various color generation fabricated by a quite simple and cost-effective method applying nanoimprint process and aluminum film deposition. We experimentally evaluated the reflectance spectra of the color pallets composed of the plasmonic nanostructures (plasmonic color pixels) and compared with the simulation results. We confirmed the wide-range tuning ability of reflection color by changing the size parameter of the plasmonic nanostructures. Therefore, this method for high-definitive color generation can be expected to be applied to a wide range of fields including various applications, such as security labels, anti-counterfeiting devices, information storage and functionalized decoration.

最近已经积极研究了等离子纳米结构或超表面，以产生结构颜色。控制与入射电磁波的共振相互作用引起的沿金属介电界面激发的表面等离振子极化子的等离激元共振波长，可以在可见光波长范围内有效地调节反射或透射色。然而，等离子体结构传统上是通过电子束光刻或聚焦离子束制造的，既昂贵又无用，以至于它们不能大规模生产。在本报告中，我们展示了一种通过应用纳米压印工艺和铝膜沉积的非常简单且经济高效的方法制造的用于各种颜色生成的简单等离子体纳米结构。我们通过实验评估了由等离子体纳米结构（等离子体彩色像素）组成的色板的反射光谱，并与仿真结果进行了比较。我们通过改变等离子体纳米结构的尺寸参数，确认了反射色的宽范围调节能力。因此，可以期望这种用于高清晰度颜色生成的方法被应用于包括安全标签，防伪装置，信息存储和功能化装饰等各种应用的广泛领域。