Tunable filter based on one-dimensional photonic crystal including nanocomposite material Hatem H. Rashwan, Samia I. Mostafa, Enas H. El-Khawas and Sahar A. El-Naggar Eur. Phys. J. D, 76 3 (2022) 50 Published online: 15 March 2022 DOI: 10.1140/epjd/s10053-022-00373-y