Highly sensitive photonic crystal fiber optic sensor for cancer cell detection Pibin Bing, Jingya Zhao, Xinyi Zhang, Zhongyang Li, Hongtao Zhang, Jingli Wang and Jianquan Yao Eur. Phys. J. Plus, 139 6 (2024) 543 Published online: 24 June 2024 DOI: 10.1140/epjp/s13360-024-05360-3