Chiral Perovskite Photonic Synapses With Anion‐Mediated Carrier Relaxation for Enhanced 3D Tracking and Trajectory Reconstruction

ABSTRACT

Circularly polarized light (CPL) provides additional degrees of freedom for visual information processing in artificial photonic synapses (APS). However, achieving carrier dynamics modulation for synaptic behavior conflicts with maintaining the inherent chiral properties of the material. Here, we propose an anion‐mediated carrier relaxation strategy to achieve CPL perception and synaptic functional coupling in the chiral perovskite material. The partial substitution of I ⁻ with SCN ⁻ in the chiral perovskite (R/S‐NEA)PbI ₃ lattice reduces the migration barrier of I ⁻ , facilitating iodine vacancy generation and inducing intermediate energy level formation. These intermediate states extend carrier relaxation times, while the similar ionic radius of SCN ⁻ and I ⁻ maintain the intrinsic chiral optical properties of the material. The CPL‐sensitive APS was prepared using this modified chiral material. Leveraging polarization‐dependent temporal dynamics of APS, a multidimensional neuromorphic vision system integrating CPL information, parallax, and optical flow features was constructed for 3D motion analysis. In 3D scene testing, the system achieves a fish trajectory tracking accuracy of 97.25% and reliably distinguishes six distinct motion directions. This approach provides a promising pathway toward intelligent visual perception systems to achieve efficient information processing in complex application scenarios, such as autonomous driving and robotics.