Annular photonic crystal biosensor for blood components and blood infections Donia M. Nasr, Samia I. Mostafa and Mona A. El Naggar Eur. Phys. J. D, 79 4 (2025) 39 Published online: 25 April 2025 DOI: 10.1140/epjd/s10053-025-00970-7