Georgiev, K. ChTrifonov, AntonZangeneh Kamali, KhosroNeshev, DragomirCrotti, GiuliaValle, G DellaPetrov, L. S.Buchvarov, IvanLalanne, PhilippeZouhdi, Said2024-07-172024-07-1718 - 21 Ju2429-1390https://hdl.handle.net/1885/733713998We demonstrate ultra-fast all-optical switching based on the implementation of a metasurface-based laser dichroic mirror design. The crystalline silicon metasurfaces with 100 nm thickness on sapphire substrates are fabricated using established processes in Si-semiconductor industry. Under weak-pump excitation, relative transmittance changes of up to 100% are possible for characteristic times ranging from 25 to 120 ps. A carrier-driven absolute amplitude modulation of over 72% is observed at 102-120 ps relaxation times. A CW 1030 nm laser's beam modulation for free space communication is verified in a laboratory environment.This work is part of the METAFAST project (no. 899673) funded by the European Union’s Horizon 2020 and HEPHAESTUS grant (DO1-307) of the Bulgarian National Roadmap for Research Infrastructure funded by Ministry of Education and Science of Republic of Bulgaria.application/pdfen-AU© 2023 MetaPress20232023-12-24