Xueqing Xia, Qinran Jiang, Zijun Zhang, Yutian Liu, Lu Cai, Xueer Xu, Weifeng Jiang, Jingli Wang, Hongdan Wan. "Highly sensitive multi-frequency acoustic sensor based on a high-Q graded hollow-core optical microcavity." Applied Physics Letters, 2026. doi:10.1063/5.0335569