Bio-inspired mid-infrared neuromorphic transistors for dynamic trajectory perception using PdSe2/pentacene heterostructure
Huaiyu Gao, Xiaoyong Jiang, Xinyu Ma, Minrui Ye, Jie Yang, Junyao Zhang, Yangchen Gao, Tangxin Li, Hailu Wang, Jian Mei, Xiao Fu, Xu Liu, Tongrui Sun, Ziyi Guo, Pu Guo, Fansheng Chen, Kai Zhang, Jinshui Miao, Weida Hu, Jia Huang
Abstract
Mid-infrared (MIR) intelligent sensing technology is essential for precise identification and tracking for dynamic target detection in challenging and low-visibility environments. However, existing MIR vision systems based on traditional von Neumann architecture face significant delays and inefficiencies due to the separation of sensing, memory, and processing units. Neuromorphic motion devices offer better tracking capabilities, but most studies are limited to the near-infrared spectrum. Inspired by the fire beetle’s MIR sensing capabilities, we have developed an MIR neuromorphic device using a 2D inorganic/organic heterostructure. The device exhibits biological synaptic behavior in the MIR region (up to 4.25 μm) based on the persistent photoconductivity (PPC) effect, successfully realizing the function of dynamic trajectories memorization with real-time hardware implementation. Additionally, a reservoir computing (RC) system trained on an MIR flame motion dataset achieves a recognition accuracy of 94.79% in classifying flame motion direction. While the research on MIR neuromorphic devices is limited, this study underscores the potential of such devices to advance MIR-based machine vision applications. Neuromorphic motion devices improve dynamic tracking but are generally limited to near-infrared. Here, the authors use PdSe2/pentacene heterostructures to develop a neuromorphic transistor for efficient mid-infrared real-time motion trajectory memorization and flame direction classification.