Extrinsic chirality in metasurfaces: Traditional and unconventional experiments – INVITED Emilija Petronijevic, Alessandro Belardini, Hari Prasath Ram Kumar, Grigore Leahu, Roberto Li Voti and Concita Sibilia EPJ Web Conf., 287 (2023) 12001 Published online: 18 October 2023 DOI: 10.1051/epjconf/202328712001