Fig. 1: Photodiodes (PD) integrated with RRAMs.
From: Optoelectronic array of photodiodes integrated with RRAMs for energy-efficient in-sensor computing
a Schematic of a single PD-RRAM cell. Detecting mode: control terminals of the R0 and PD with the RRAM terminal floated. Writing mode: control terminals of the R0 and RRAM with the PD terminal floated. Reading mode: control three terminals under the short-circuit condition. b The corresponding schematic of the cross-sectional view of the PD-RRAM cell. c Microscope image (left) of chip packaging. Scale bar, 0.6 mm. Microscope image (middle) of the fabricated 3 × 3 PD-RRAM array. Scale bar, 120 μm. Microscope image (right) of the PD-RRAM cell. Scale bar, 30 μm. d Resistance-tunable weight (theoretically) and photo-responsivity (experimentally). The weight (that is, terminal current ratio of the RRAM to PD in the reading mode) set by programming RRAMs, is proportional to the Re (that is, ratio of the Iout to the incident light power in the reading mode)
