Programmable Phase-change Metasurface for Multimode Photonic Convolutional Neural Network
Changming Wu, Seokhyeong Lee, Heshan Yu, Ruoming Peng, Ichiro Takeuchi, Mo Li · 2020
We demonstrate a programmable TE0-to-TE1 mode converter utilizing phase change material Ge2Sb2Te5based phase gradient metasurface integrated on a waveguide. This compact mode converter features high energy efficiency, high precision and broadband performance and is very promising toward a large-scale photonic processor for neural networks.