An Integrated Luminescent Information Encryption–Decryption and Anticounterfeiting Chip Based on Laser Induced Graphene

Abstract

Visual optical information encryption–decryption and anti‐counterfeiting (IEDAC) technology play a vital role in the field of information security. Recent luminescent information encryption technologies face the disadvantages of depending on external large‐scale stimulus decryption equipment, inability to read out repeatedly, and information leakage, impeding the practical applications of luminescence encryption. Here, an integrated luminescent IEDAC chip is proposed, which provides a convenient approach to store and decipher pre‐patterned luminescence information based on laser engraved template and film heater. The luminescent encryption chip contains a double‐layer structure made up of long persistent phosphors based on SrCaGa4O8 host and a laser induced graphene heater, which makes it possible to decrypt information on a single chip. This design enables dual‐mode (photoluminescence/long persistent luminescence), dual‐color (blue/yellow‐green), and multi‐level IEDAC function, providing a novel insight and integrated strategy for implementing advanced IEDAC technologies.

Optical Logic Operation Encryption on ZnTe Flake

“…Compared with other complex PL encryption methods, ZnTe can achieve optical logic operation encryption without complex structure and treatment. [4,6,11,22,[29][30][31] Thus, ZnTe is promising for external field modulation to realize logic operation encryption.…”

A Temporal and Space Anti-counterfeiting Based on the Four-Modal Luminescent Ba2Zr2Si3O12 Phosphors

“…Fake and shoddy products are wildly popular all over the world, which have seriously damaged the reputation of all countries and caused a crisis of trust. In recent years, fluorescent materials have been employed in anti-counterfeiting technology. − Due to their high luminescent intensity, fluorescent materials could exhibit multi-luminescent modes under the action of various external stimuli and show good durability and wide application scenarios. − Although a variety of fluorescent anti-counterfeiting materials have been developed, most of them are excited by a single ultraviolet (UV) mode . Moreover, a long persistent luminescence (LPL) property has been developed for anti-fake application as well .…”

Electric‐Tunable Photoluminescence of 2D ErOCl for High‐Security Encryption of Programmable Information

“…[4][5][6][7] Especially, luminescent materials with multi-level encryption have attracted increasing attention. [8][9][10][11] For example, Zhang et al designed thermoswitchable fluorescent materials which have multimode response modulated by the thermally induced change of phase. [8] This kind of encryption can hardly be decrypted due to its high complexity and switchable ability, which will contribute to a senior security level.…”

“…[ 4–7 ] Especially, luminescent materials with multi‐level encryption have attracted increasing attention. [ 8–11 ] For example, Zhang et al. designed thermoswitchable fluorescent materials which have multimode response modulated by the thermally induced change of phase.…”