Wavelength-Controlled Triple-Mode Photoconductance-Polarity-Switching Field Effect Transistor for Secure Time-Variable Encrypted Optical Communication

device, the triple-channel real-time secure optical communication system with time-variable encryption algorithms is demonstrated, exponentially increasing the difficulty of brute-force cracking by synchronizing the time-variable key channel with two information channels. This work not only enhances the understanding of sub-bandgap photoresponse mechanisms in 2D material photodetectors but also offers promising avenues for the development of optoelectronics-assisted wireless communication technologies.