Multimode luminescence generally involves tunable photon emissions in response to various excitation or stimuli channels, which demonstrates high coding capacity and confidentiality abilities for anti-counterfeiting and encryption technologies. Integrating multimode luminescence into a single stable material is a promising strategy but remains a challenge. Here, we realize distinct long persistent luminescence, short-lived down/upconversion emissions in NaGdTi₂O₆:Pr³⁺, Er³⁺ phosphor by emloying interplay of defect levels and rare earth emission centers. The materials show intense colorful luminescence statically and dynamically, which responds to a wide spectrum ranging from X-ray to sunlight, thermal disturbance, and mechanical force, further allowing the emission colors manipulable in space and time dimensions. Experimental and theoretical approaches reveal that the Pr³⁺ ↔ Pr⁴⁺ valence change, oxygen vacancies and anti-site Ti_Gd defects in this disordered structure contributes to the multimode luminescence. We present a facile and nondestructive demo whose emission color and fade intensity can be controlled via external manipulation, indicating promise in high-capacity information encryption applications.

多模发光通常涉及响应于各种激发或刺激通道的可调谐光子发射，这证明了防伪和加密技术的高编码能力和保密能力。将多模发光集成到单一稳定材料中是一种很有前途的策略，但仍然是一个挑战。_{在这里，我们在 NaGdTi 2} O ₆ :Pr ³⁺ , Er ³⁺中实现了明显的长持续发光、短寿命下/上转换发射通过使用缺陷水平和稀土发射中心的相互作用来制备磷光体。这些材料静态和动态地显示出强烈的彩色发光，响应从 X 射线到太阳光、热扰动和机械力的广泛光谱，进一步允许在空间和时间维度上操纵发射颜色。实验和理论方法表明，这种无序结构中的 Pr ³⁺ ↔ Pr ⁴⁺价态变化、氧空位和反位 Ti _Gd缺陷有助于多模发光。我们展示了一个简单且非破坏性的演示，其发射颜色和褪色强度可以通过外部操作进行控制，表明在大容量信息加密应用中很有前途。