fig6

Figure 6. Three-terminal neuromorphic devices. (A) Optical micrograph of the OTS device and transport mechanism; (B) Schematic diagram comparing biological RGCs and artificial RGCs; (C) Output spike measured from the device connected in series with a resistor (V_ds = 5 V). Change in device output with and without illumination; (D) Schematic of an electric double-layer transistor based on VO₂. (A-C) Reproduced with permission Copyright 2022, Nano Letters^[92]. (D) Reproduced with permission Copyright 2012, Nature^[95]. OTS: Ovonic threshold switching; RGCs: retinal ganglion cells.