论文标题
高分辨率的直接激光打印物理上无统治的反爆炸标签
Direct laser printing of high-resolution physically unclonable anti-counterfeit labels
论文作者
论文摘要
结合便捷的结构颜色读数和物理上不可吻合的单向功能（PUF）方法的安全标签提供了有希望的策略，以抵制伪造可销售产品的斗争。在这里，我们证明了直接的飞秒激光打印是合理的，这是一种简单且可扩展的技术，用于制造高分辨率（每英寸12500个点）和耐用的PUF标签，其编码能力的大量为10 $^{895} $以及简单的无光谱光学信号读数。所提出的标签由激光打印的等离激元纳米结构，表现出独特的光散射行为和无法封闭的3D几何形状。纳米结构几何形状的不可控制的随机变化在其斑点打印过程中导致每个激光打印的“像素”的散射颜色的随机和宽带变化，从而使激光打印的图案独特且适合PUF标记。
Security labels combining facile structural color readout and physically unclonable one-way function (PUF) approach provide promising strategy for fighting against forgery of marketable products. Here, we justify direct femtosecond-laser printing, a simple and scalable technology, for fabrication of high-resolution (12500 dots per inch) and durable PUF labels with a substantially large encoding capacity of 10$^{895}$ and a simple spectroscopy-free optical signal readout. The proposed tags are comprised of laser-printed plasmonic nanostructures exhibiting unique light scattering behavior and unclonable 3D geometry. Uncontrollable stochastic variation of the nanostructure geometry in the process of their spot-by-spot printing results in random and broadband variation of the scattering color of each laser printed "pixel", making laser-printed patterns unique and suitable for PUF labeling.
