激光阈值
像素
编码(内存)
材料科学
激光器
光电子学
纳米线
编码
计算机科学
钙钛矿(结构)
随机性
纳米技术
计算机硬件
光学
人工智能
物理
工程类
波长
生物化学
化学
统计
数学
基因
化学工程
作者
Lei Liang,Wangqi Mao,Xinyu Gao,Chenglin He,Zilan Tang,Hao Chang,Long Zhang,Xiaoxia Wang,Hongxing Dong,Anlian Pan
标识
DOI:10.1002/lpor.202301006
摘要
Abstract Physically unclonable functions (PUFs) have emerged as the most effective method against counterfeiting, leveraging the intrinsic randomness of objects to avoid data replication. However, despite their efficacy, the complexity and high cost of most PUF‐based counterfeiting labels hinder their practical application. Here, a high‐capacity PUF label based on vertically aligned perovskite nanowire (NW) arrays is demonstrated. The NW arrays are conveniently constructed using a low‐cost solution process using an anodized aluminum oxide template. Each pixel within the label is composed of closely packed CsPbBr 3 NW arrays of different lengths, resulting in varied lasing signals. The collected signal of each pixel emerged from the lasing output of the NW arrays, generating high‐density and nonuniform multiple‐mode lasing to facilitate information encoding. A quaternary encoding mechanism is used to encode the number of laser modes per pixel. Impressively, it exhibits a mapping resolution of 1600 pixels within 400 µm 2 , achieving an impressive encoding capacity (1.97 × 10 963 ) and a pixel density (4 bits µm −2 ) in this compact area. This work shows a promising approach for anticounterfeiting applications because of its simplicity, low cost, and high encoding capacity.
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