Credit: Light: Science & Applications
a, I-V characteristic of a G/M/G device with binary photoresponse switching when the voltage sweeps from 0 to 2 V, from 2 V to -2 V, and back to 0 V. b, Correlation of changes in the ratio of the intensities of Raman scattering and shifts of the G mode of graphene electrodes and states of the non-volatile photoresponse. c, TCAD-simulated dark/photo current of the G/M/G device for LPS, TCAD-simulated electron current densities distribution of low photoresponse state under illumination. d, TCAD-simulated dark/photo current of the G/M/G device for high photoresponse state, TCAD-simulated electron current densities distribution of LPS under illumination.