Extreme Polaritonic Interactions in a Room‐Temperature Designable Sub‐Nanocavity Quantum Electrodynamic Platform. - Hu, Huatian; Shu, Xin; Hu, Zhiwei; Zheng, Di; Zhang, Ruiqian; Cui, Ximin; Dai, Wei; Lan, Xiang; Han, Xiaobo; Chen, Wen; Xu, Hongxing (Advanced Science, 2026)