Fig. 4: Digital processing in the system.
From: Programmable nonlinear optical neuromorphic computing with bare 2D material MoS2
a ΔT mappings under different control powers in 6 cells with different thicknesses. Scale bars, 100 nm. b The average ΔT under different control powers in 6 cells, the gradient \(\frac{d\varDelta T}{{\mbox{d}}{P}_{{Ctl}}}\) is determined by the cell thickness. The control pulse delay was 0 for (a) and (b). c Truth table of logic functions. d The input signal encodings and selected input cells for different logic functions. For AND and OR logic, the control pulse delay is 0, and input bits are encoded by the control pulse power. For NAND and NOR logic, the control pulse power is 0, and input bits are encoded by the control pulse delay. e The output ΔT of the system can achieve different logic functions based on the setup scheme. The red dashed line indicates the defined ΔT threshold. f Based on the same encoding scheme of AND and OR logic, the output ΔT in cells 1, 3, 4, and 6 can form an optical 4-bit DAC.
