Gu, J. et al. 2021. Efficient On-Chip Learning for Optical Neural Networks Through Power-Aware Sparse Zeroth-Order Optimization. Proceedings of the AAAI Conference on Artificial Intelligence. 35, 9 (May 2021), 7583–7591. DOI:https://doi.org/10.1609/aaai.v35i9.16928.