Holographic, traceable, and switchable anti-counterfeiting using temperature-tolerant relief gratings on polyimide substrate

Chengwei Xiao, Haixian Shi, Hao Zhong, C.-W. Zou, Yiyong Chen, Jinru Li, Weien Liang, Wanying Zhang, Dezhi Zhan, Shilong Zhong, Rui Chen, Zhaoxiang Zhu, Cheng Wang, Yujie Chen, Xudong Chen