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Introducing Chiro-optical Activities in Photonic Synapses for Neuromorphic Computing and In-Memory Logic Operations
Soirik Dan1, Subham Paramanik1, Amlan J Pal1,2
1School of Physical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India.
ACS Nano
|May 20, 2024
Summary
Chiral perovskites enable handedness-dependent photonic synaptic devices for neuromorphic computing. These artificial synapses, using circularly polarized light, perform logic operations with chirality-dependent AND/NOR gate functions.
Area of Science:
- Materials Science
- Optoelectronics
- Neuromorphic Computing
Background:
- Artificial synaptic devices are crucial for neuromorphic computing, typically using electrical or optical pulses.
- Chiral materials offer a novel approach to tailor device characteristics for advanced functionalities.
Purpose of the Study:
- To introduce chiral materials for photonic synaptic devices.
- To achieve handedness-dependent neuromorphic computing and in-memory logic gates.
- To emulate complex brain functions using artificial synapses.
Main Methods:
- Fabrication of two-terminal devices using chiral perovskites.
- Stimulation with circularly polarized light (CPL) to mimic synaptic functionalities.
- Observation of current anisotropy due to spin-selective carrier transport.
Main Results:
- Chiral perovskite devices demonstrated electrical and opto-synaptic functionalities.
- Observed current anisotropy linked to out-of-plane carrier transport and spin-selective transport.
- Chirality-dependent logic gates: R-device as AND, S-device as NOR.
Conclusions:
- Chiral perovskites are promising for developing handedness-dependent artificial synapses.
- Findings pave the way for future neuromorphic computing, vision simulation, and AI.
- Chirality-dependent logic operations offer new strategies for in-memory computing.
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