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Bidirectional All-Optical Synapses for Neuromorphic Computing and Vision.

Zifan Li1, Zicheng Zhang2, Zhenhui Tao1

  • 1Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), School of Flexible Electronics (Future Technologies), Nanjing Tech University (NanjingTech), Nanjing, China.

Small (Weinheim an Der Bergstrasse, Germany)
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PubMed
Summary
This summary is machine-generated.

Researchers developed a novel all-optical synapse (AOS) using a carbon dot hybrid (CDH) for bidirectional neuroplasticity. This breakthrough enables advanced optical computing and neuromorphic imaging with high accuracy.

Keywords:
all‐opticalbidirectional synaptic plasticitycarbon dotsmotion detectionoptical neural network

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Area of Science:

  • Optoelectronics
  • Materials Science
  • Neuroscience

Background:

  • All-optical synapses (AOS) are crucial for optical computing and neuromorphic imaging.
  • Current AOS often lack bidirectional weight modulation, limiting their functionality.
  • Achieving both excitatory and inhibitory outputs optically remains a significant challenge.

Purpose of the Study:

  • To develop a novel strategy for bidirectional neuroplasticity in all-optical synapses.
  • To overcome the limitations of unidirectional weight modulation in existing AOS.
  • To create a phosphorescent and photothermal carbon dot hybrid (CDH) neurotransmitter for advanced optical signal processing.

Main Methods:

  • A dual-photon-mediated strategy was employed using ultraviolet and infrared light.
  • Controllable exciton release and superposition of phosphorescent emission were utilized.
  • A phosphorescent and photothermal carbon dot hybrid (CDH) was engineered as a neurotransmitter.

Main Results:

  • Demonstrated bidirectional neuroplasticity (potentiation and depression) within the CDH neurotransmitter.
  • Achieved controllable optical logic operations and neurovision capabilities.
  • Realized real-time tracking and recognition of light objects with 97% accuracy, including trajectory, velocity, and direction.

Conclusions:

  • The developed CDH neurotransmitter enables all-optical regulation for innovative phosphorescent paradigms.
  • This work advances all-optical computing and neuromorphic imaging by overcoming unidirectional modulation limitations.
  • The dual-photon strategy offers a new pathway for designing sophisticated optical neuro-mimetic devices.