Programming Multi‐Timescale Carrier Dynamics in Circularly Polarized Light Photodetectors for Polarization Neuromorphic Vision

Authors:
Publisher website
Google Scholar
Abstract
Reliable recognition of complex scenes remains challenging because physically distinct objects can exhibit similar appearances in conventional intensity images, while dynamically changing environments require continuous temporal information processing. Although circularly polarized light (CPL) provides an additional optical dimension for distinguishing surface reflection properties, integrating efficient polarization perception with multi‐timescale synaptic plasticity in a single material platform remains difficult because these functionalities require fundamentally different carrier dynamics. Here, we demonstrate that donor–acceptor composition engineering in chiral bulk‐heterojunction diodes enables programmable carrier dynamics across multiple timescales. By regulating the balance between carrier transport and trapping, the devices evolve from volatile through quasi‐nonvolatile to nonvolatile synaptic plasticity while preserving efficient CPL photodetection. The optimized composition delivers a photocurrent dissymmetry factor of −0.026, whereas complementary volatile and nonvolatile devices enable cooperative temporal information processing. As a proof of concept, a polarization neuromorphic vision system combining RGB–CPL multidimensional perception and multi‐timescale memory improves static recognition accuracy by 15% and dynamic recognition accuracy by up to 12% compared with conventional systems. This work establishes donor–acceptor composition engineering as a strategy for coordinating optical perception and temporal computation, opening opportunities for polarization‐aware neuromorphic vision and intelligent optoelectronics.
Funding Information
  • National Natural Science Foundation of China (52403230)
  • National Natural Science Foundation of China (62374033)
  • National Natural Science Foundation of China (22475165)
  • Natural Science Foundation of Fujian Province (2024J011310)
  • Natural Science Foundation of Fujian Province (2025J09059)

This publication has 19 references indexed in Scilit: