Anti-Interference All-Optical Logic Computing Based\non a 2D Polarization-Sensitive Photodiode

Optical\nlogic operation is promising for ultrafast information\nprocessing and optical computing due to the high computation speed\nand low power consumption. However, conventional optical logic devices\nrequire either a complex structure and circuit design or a constant\nvoltage supply, which impedes the development of high-density integrated\ncircuits. Here, all-optical logic devices are designed using a self-powered\npolarization-sensitive photodiode of the GeSe homojunction, which\nis attributed to an anisotropic band structure and built-in electric\nfield. The single photodiode can realize linear logic functions (AND,\nOR, NAND) and a nonlinear logic gate (XOR) by programming wavelength,\npower density, and polarization angle. Moreover, complex logic functions\n(XNOR, Y = IN1, Y = IN2, Y = IN1, and Y = IN2) can be achieved through integrating two photodiodes\nin parallel. In addition, the neural network algorithm is utilized\nto validate the feasibility of all-optical logic computing and anti-interference.\nThis work proposes an avenue to design an all-optical reconfigurable\nlogic operation in polarization-sensitive devices.