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A Gate-Tunable Adaptive Optoelectronic Synapse with Broadband Response for Neuromorphic Vision.

Chen Li1,2,3, Kesheng Cao1, Yilong Lu1

  • 1School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China.

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|June 9, 2026
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Summary

This study introduces a novel optoelectronic synapse using a 2D MoS2/GeSe heterojunction, achieving broadband spectral sensitivity and dynamic adaptation for advanced neuromorphic vision systems.

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Area of Science:

  • Materials Science
  • Neuroscience
  • Optoelectronics

Background:

  • Current optoelectronic synapses have limited spectral range and adaptation.
  • Neuromorphic systems require devices with broad spectral sensitivity and dynamic adaptation.

Purpose of the Study:

  • To develop a gate-tunable optoelectronic synapse with broadband spectral sensitivity and adaptive capabilities.
  • To overcome limitations of existing optoelectronic synapses for neuromorphic applications.

Main Methods:

  • Fabrication of a gate-tunable optoelectronic synapse using a 2D MoS2/GeSe van der Waals heterojunction.
  • Characterization of the device's spectral response and synaptic plasticity emulation.
  • Integration of the device into a neuromorphic visual system.

Main Results:

  • The device exhibits continuous broadband spectral response from UV (295 nm) to NIR (830 nm).
  • Demonstrated emulation of diverse synaptic plasticities and visual adaptation (scotopic/photopic) via gate-voltage modulation.
  • Successful integration into a neuromorphic system for efficient image preprocessing and recognition.

Conclusions:

  • The developed MoS2/GeSe optoelectronic synapse offers high performance and adaptive functionalities.
  • This work presents a viable strategy for advanced neuromorphic visual perception systems.
  • The device shows potential for intelligent visual processing applications.