Cu ⁺ ‐Activated Borosilicate Glass for Multimodal Dynamic Anti‐Counterfeiting and Multifunctional X‐Ray Imaging

Optical functional glasses are promising candidates for advanced anti‐counterfeiting and X‐ray imaging. However, conventional anti‐counterfeiting strategies predominantly rely on static optical responses susceptible to spectral replication, while most scintillators remain restricted to single real‐time imaging, confining their applicability in extreme environments. Herein, a Cu + ‐doped borosilicate glass is developed as an integrated platform combining multimodal dynamic optical anti‐counterfeiting with multifunctional X‐ray imaging. Synergistic interactions between isolated Cu + and Cu + dimers induce excitation wavelength‐, irradiation source‐, and temperature‐dependent dynamic multicolor luminescence, accompanied by a faint afterglow and thermally stimulated luminescence under X‐ray irradiation. Furthermore, the glass demonstrates exceptional scintillation performance with an X‐ray excited luminescence (XEL) intensity reaching 176% of commercial BGO crystals, coupled with remarkable high‐temperature tolerance (101% at 423 K and 71% even at 573 K), outstanding radiation resistance, and superior environmental durability. These integrated functionalities support dynamically tunable optical anti‐counterfeiting, Morse code‐based information encryption, and high‐resolution X‐ray imaging under real‐time (32.3 lp/mm), high‐temperature, and time‐lapse conditions (14 lp/mm), providing a single‐material glass platform for multimodal optical security and advanced multifunctional X‐ray imaging.