A dynamic three-path authenticating model for anti-counterfeiting in a single host of CaAl2Si2O8

Abstract

Luminescent materials are one of the most fascinating candidates for the field of data communication and information security because of their special optical characteristics. Unfortunately, unimodal output of luminescent performance reaches unsatisfied security of anti-counterfeiting. Hence, achieving multicolor, multitemporal, and multimodal luminescence performance simultaneously is still a fascinating target, especially in a single host. Here, multi-model optical output is realized for the multiple emission centers of CaAl2Si2O8 doped with Eu3+/Eu2+ ions. Moreover, a successive defect structure is constructed via the introduction of Nd3+ ions, which enables the thermo-/photon- responded luminescence properties. Herein, an efficient three-path authenticating model that performs a dynamic multiple color response and stimulated-sources dependent emission is accomplished in the CaAl2Si2O8 host matrix. The explored multichannel approach offers a unique insight for designing advanced anti-counterfeiting technology.