Extrinsic chirality in metasurfaces: Traditional and unconventional experiments – INVITEDEmilija Petronijevic, Alessandro Belardini, Hari Prasath Ram Kumar, Grigore Leahu, Roberto Li Voti and Concita SibiliaEPJ Web Conf., 287 (2023) 12001DOI: https://doi.org/10.1051/epjconf/202328712001