Polarization-perceptual anisotropic two-dimensional ReS₂ neuro-transistor with reconfigurable neuromorphic vision

Abstract

Polarization is a common and unique phenomenon in nature, which reveals more camouflage features of object. However, current polarization-perceptual devices based on conventional physical architectures are still facing enormous challenges...

Controlled Optoelectronic Response in van der Waals Heterostructures for In‐Sensor Computing

“…[ 45,46 ] An ideal hardware equivalent to a biological synapse would be realized based on the analogue electronics, which can efficiently emulate the complex biological synaptic plasticity. In this regard, three‐terminal memristive transistors based on 2D materials are particularly amenable to the emulation of a wide spectrum of synaptic behaviors due to their versatile electronic properties, [ 47 ] rich photoresponse characteristics, [ 48,49 ] and unique device response enabled by functional vdW heterostructures. [ 50 ] A prominent feature of the synaptic plasticity would be that short‐ (temporal synaptic connection change) and long‐term (permanent synaptic connection change) plasticity coexist in a synapse, depending on the biological action potential‐controlled neuro‐transmitter release process ( Figure a), which constitutes the foundation of the learning and memory process in a biological system.…”

Programmable ferroelectric bionic vision hardware with selective attention for high-precision image classification

“…A series of UV light pulses (1 μW/cm 2 ) with different durations are applied to the device, which presents the current response with variable durations under positive (40 V polarization) and negative polarization (−40 V polarization), respectively. The memory factor ( η M ) can reflect the memory strength after light stimuli, which is defined as 43 where I 0 is the original current. After positive polarization, the memory factor increases from 34.5% to 47.1%, which exhibits obvious LTP behavior, while current exhibits STP behavior ( η M = 9.1%) after negative polarization.…”

“…A series of UV light pulses (1 μW/cm 2 ) with different durations are applied to the device, which presents the current response with variable durations under positive (40 V polarization) and negative polarization (−40 V polarization), respectively. The memory factor (η M ) can reflect the memory strength after light stimuli, which is defined as 43 η M = I R À I 0…”

Wavelength and Polarization Sensitive Synaptic Phototransistor Based on Organic n-type Semiconductor/Supramolecular J-Aggregate Heterostructure

“…, linear and circular polarity) information, suggesting that the more we can finely discriminate this spectropolarimetric information, the greater the amount of visual information we can acquire of our environment. Several photodetecting systems that can recognize a specific wavelength and polarity of light have been developed for application in future technology such as hyperspectral imaging, biomedical imaging, security and surveillance, spectral analysis, and polarization-perceptual neuromorphic vision . However, most photodetectors require additional optical filters to detect a specific color or a specific polarization, which thus hampers the development of compact high resolution devices .…”

“…Several photodetecting systems that can recognize a specific wavelength and polarity of light have been developed for application in future technology such as hyperspectral imaging, 3 biomedical imaging, 4 security and surveillance, 5 spectral analysis, 6 and polarization-perceptual neuromorphic vision. 7 However, most photodetectors require additional optical filters to detect a specific color or a specific polarization, which thus hampers the development of compact high resolution devices. 8 Moreover, since the traditional photodetectors can only convert incident photons to electrical signals, additional memory and signal processors are essential for imaging applications, which restrict efficient real-time data processing of large quantities of visual information.…”