2D/3D Geometric Multiplexing via Orthogonal Control of Circularly Polarized Transmission and Long Afterglow Imaging

Multiplexed optical imaging is highly desirable for enhancing information security. However, shaping optically active materials with circularly polarized long afterglow (CPLA) into 3D geometric structures for multiplexing stereoscopic display and multidirectional encryption remains a significant challenge. Herein, a novel strategy is proposed for designing multiplexed encryption patterns using twisted-stacking hierarchical structures that exhibit remarkable optical activity and CPLA properties. The hybrid films display dynamically orthogonal control of circularly polarized transmission patterns in daylight and switchable CPLA images in darkness, both of which can be directly viewed by the naked eye using left- or right-handed circularly polarized filters, and independently modulated without mutual interference during dynamic regulation process. Furthermore, it is demonstrated that this highly integrated platform can be utilized as 3D geometric multimodal image multiplexing toward advanced anti-counterfeiting and information encryption applications.