Exploring and evaluating extremely efficient designs for filter-based spectral modulesAliaksei Kobylinskiy, Sebastian Henkel, Marcel Binder, Xavier Uwurukundo, Lukas Werner, Hartmut Hillmer, Jens Bliedtner and Robert BrunnerEPJ Web Conf., 335 (2025) 03016DOI: https://doi.org/10.1051/epjconf/202533503016