Visible-SWIR Sensitive Artificial Retina for Vision Sensors
- Resource Type
- Conference
- Authors
- Kumar, Manoj; Bhattacharya, Kritika; Das, Samaresh
- Source
- 2024 8th IEEE Electron Devices Technology & Manufacturing Conference (EDTM) Electron Devices Technology & Manufacturing Conference (EDTM), 2024 8th IEEE. :1-3 Mar, 2024
- Subject
- Bioengineering
Components, Circuits, Devices and Systems
Computing and Processing
Engineered Materials, Dielectrics and Plasmas
Engineering Profession
Fields, Waves and Electromagnetics
General Topics for Engineers
Photonics and Electrooptics
Visualization
Pulse measurements
Wavelength measurement
Vision sensors
Retina
Photoreceptors
Manufacturing
- Language
In this study, we proposed a light sensitive artificial Spike-Afferent Visual Optoelectronic Nerve (SAVON) circuit for retinomorphic applications. The proposed SAVON circuit is designed with serially connected $WS _{2} /$Ge heterostructure as photoresponsive cell (i.e. emulating the photoreceptors functionality) and ${MoS}_{2}$ based Threshold Switching (TS) device emulating as artificial memristive neuron. We experimentally measured the photoresponse (i.e. from 660 nm to 1540 nm wavelength range) characteristics of our Pulsed Laser Deposited (PLD $) WS _{2} {/Ge} -$heretrostructure. Our heterostructure exhibits $\ge 10$% responsivity improvement as compared to organic counterparts. The proposed SAVON circuit exhibits the light dependent frequency modulation property thus encoding the illumination into electrical spike pulses. We simulated a spiking network for full MNIST-based image classification application and observed the maximum train/ test accuracy of 96.09%/ 93.86%, respectively.