Fig. 3: Electrical and optical stimulation of synaptic functions of b-As0.2P0.8 phototransistor.
From: Polarization-sensitive neuromorphic vision sensing enabled by pristine black arsenic-phosphorus
a Schematic diagram comparing biological synapses and designed artificial polarization synaptic devices. b Changes in EPSC induced by paired presynaptic optical pulses with a 1 s pulse width. A0 and A1 denote the changes in EPSC observed after the first and second pulses, respectively. c Transition of EPSC from ST to LTP through six repeated stimulations under 1550 nm illumination. d, e EPSC response as a function of varying polarization angles and Vg, respectively. f PPF index of b-As0.2P0.8 device under different polarizations with Vg from −60 to 60 V under 1550 nm laser. g Statistical comparison of PPF ratios in the b-As0.2P0.8 device relative to similar previously reported devices49,50
