Hetero‐Integrated InGaAs Photodiode and Oxide Memristor‐Based Artificial Optical Nerve for In‐Sensor NIR Image Processing

Abstract In‐sensor computing is an emerging architectural paradigm that fuses data acquisition and processing within a sensory domain. The integration of multiple functions into single domain reduces the system footprint while it minimizes energy time for transfer between units. However, challenging simple compact image sensor array to achieve both sensing in each pixel. Here, this work demonstrates focal plane with heterogeneously integrated one‐photodiode one‐resistor (1P‐1R)‐based artificial optical neuron emulates sensing, computing, memorization biological retina system. This employs InGaAs photodiode featuring high responsivity broad spectrum covers near‐infrared (NIR) signals HfO 2 memristor as synapse computing/memorization analog Using fabricated neural network, performs in‐sensor identification finger veins driven by NIR light illumination (≈84 % accuracy). proposed architecture broadly offers widespread application computer vision, neuromorphic biomedical engineering, etc.