Ultra-small All-Optical Logic Gate Design based on Inverse Design for Wire-less Communication

This article introduces the inverse design into the all-optical logic gates. Using direct-binary search (DBS) and the adjoint method, the ultra-small XOR logic gate is designed, and the size is only 1.2um*2.5um, which is the smallest record known so far. The device with parallel logic function in C-band and O-band is realized for the first time. All designs conform to standard processes, laying the foundation for the development of optical computing and optical neural networks.