Crystalline Grating-Waveguide Resonant reflectorsG. Mourkioti, G.A. Govindassamy, F. Li, R.W. Eason, M. Abdou Ahmed and J.I. MackenzieEPJ Web Conf., 267 (2022) 02021DOI: https://doi.org/10.1051/epjconf/202226702021