{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["13(1)"],"submitter":["Crotti G"],"pubmed_abstract":["Switching of light polarization on the sub-picosecond timescale is a crucial functionality for applications in a variety of contexts, including telecommunications, biology and chemistry. The ability to control polarization at ultrafast speed would pave the way for the development of unprecedented free-space optical links and of novel techniques for probing dynamical processes in complex systems, as chiral molecules. Such high switching speeds can only be reached with an all-optical paradigm, i.e., engineering active platforms capable of controlling light polarization via ultrashort laser pulses. Here we demonstrate giant modulation of dichroism and birefringence in an all-dielectric metasurface, achieved at low fluences of the optical control beam. This performance, which leverages the many degrees of freedom offered by all-dielectric active metasurfaces, is obtained by combining a high-quality factor nonlocal resonance with the giant third-order optical nonlinearity dictated by photogenerated hot carriers at the semiconductor band edge."],"journal":["Light, science & applications"],"pagination":["204"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC11344022"],"repository":["biostudies-literature"],"pubmed_title":["Giant ultrafast dichroism and birefringence with active nonlocal metasurfaces."],"pmcid":["PMC11344022"],"pubmed_authors":["Cerullo G","Lemaitre A","Leo G","Crotti G","Buchvarov IC","Maiuri M","Akturk M","Proietti Zaccaria R","Della Valle G","Neshev DN","Schirato A","Laporta P","Vinel V","Trifonov AA"],"additional_accession":[]},"is_claimable":false,"name":"Giant ultrafast dichroism and birefringence with active nonlocal metasurfaces.","description":"Switching of light polarization on the sub-picosecond timescale is a crucial functionality for applications in a variety of contexts, including telecommunications, biology and chemistry. The ability to control polarization at ultrafast speed would pave the way for the development of unprecedented free-space optical links and of novel techniques for probing dynamical processes in complex systems, as chiral molecules. Such high switching speeds can only be reached with an all-optical paradigm, i.e., engineering active platforms capable of controlling light polarization via ultrashort laser pulses. Here we demonstrate giant modulation of dichroism and birefringence in an all-dielectric metasurface, achieved at low fluences of the optical control beam. This performance, which leverages the many degrees of freedom offered by all-dielectric active metasurfaces, is obtained by combining a high-quality factor nonlocal resonance with the giant third-order optical nonlinearity dictated by photogenerated hot carriers at the semiconductor band edge.","dates":{"release":"2024-01-01T00:00:00Z","publication":"2024 Aug","modification":"2024-11-05T16:12:35.527Z","creation":"2024-11-05T16:12:35.527Z"},"accession":"S-EPMC11344022","cross_references":{"pubmed":["39179544"],"doi":["10.1038/s41377-024-01545-8"]}}