Lithography-Free Fabrication of Extraordinary Transmission Plasmonic Metasurfaces over Large Areas Employing Ultrafast Lasers - Casquero N; De Galarreta CR; Humphreys E; Bertolotti J; Solis J; Wright CD; Siegel J (2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2021, 2021)