Integrated photonic memory based on phase-change materials (PCM) offers a promising approach for neuromorphic computing. Here, we employ a multiscale simulation scheme, which combines density functional theory and finite-difference time-domain simulations, to investigate the low-loss origin of Sb2Se3, and design a programmable mode converter array with 5-bit precision and −0.65 dB insertion loss per node. This Sb2Se3-based photonic tensor core is predicted to be scalable to a large matrix size of 128 × 128, and simulated image recognition accuracy could be comparable to the pure software-based predictions. Our work is expected to stimulate the exploration of low-loss PCM for photonic computing.
- Xueyang Shen
- Ruixuan Chu
- Wei Zhang