Gao, R., Li, J., Dong, X., He, Y., Chen, W., Ren, P., Zhao, X., Li, M. and Yang, Z. 2026. Sub-100 Femtosecond All-Optical Modulation Beyond Electron–Phonon Limits. Nano-Micro Letters. 18, (Apr. 2026), 315. DOI:https://doi.org/10.1007/s40820-026-02166-z.