Magnetic interference gonioapparent thin film based on metal-dielectric-metal structure for optical security devices

作     者：CHEN Nan WANG Zhi-xun CHEN Hao CHEN Lin ZHAO Yan WANG Yu-si JIANG Peng-wei BU Yi-kun 陈楠;王志勋;陈昊;陈琳;赵燕;王雨思;江鹏炜;卜轶坤

作者机构：School of Electronic Science and Engineering(National Model Microelectronics College)Xiamen UniversityXiamen 361005China 

出 版 物：《Optoelectronics Letters》 (光电子快报（英文版）)

年 卷 期：2020年第16卷第2期

页      面：97-102页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：This work has been supported by the National Natural Science Foundation of China(No.U1505253) the Xiamen Science and Technology Planning Project(No.3502Z20183003) 

主　　题：film structure apparent 

摘      要：In recent years, magnetic interference thin films have gained wide attention in optical security devices field by virtue of their gonioapparent and dynamic 3D effects. Based on the color mechanism of metal-dielectric Fabry-Perot structure, a novel seven-layer magnetic thin film structure is proposed by adopting the ultrathin metal layer as a bonding layer and a pure metallic Ni layer as a magnetic layer as well as a reflective layer. Color target optimization optimac method is utilized that realizes the seven-layer metal-dielectric optically variable magnetic thin film structure with green at the normal incidence and purple-red at 60°. The structure effectively solves the delaminate problem and simplifies the multilayer structure. Through different combined magnetic field designs, the magnetic orientation experiment of the prepared magnetic optically variable thin film is carried out, and the 3 D anti-counterfeiting with remarkable dynamic color change effect is obtained, which provides a new solution for optical security devices.