Argyropoulos, ChristosD’Aguanno, GiuseppeAlù, Andrea2020-05-272020-05-272014-06-03Christos Argyropoulos et al., Giant second-harmonic generation efficiency and ideal phase matching with a double ε-near-zero cross-slit metamaterial, Phys. Rev. B, Vol. 89, Iss. 23 (2014), https://doi.org/10.1103/PhysRevB.89.235401https://doi.org/10.1103/PhysRevB.89.235401http://hdl.handle.net/11603/18768Efficient second-harmonic generation may be induced based on the anomalous tunneling properties of double zero-permittivity narrow cross-slit nonlinear channels. Ideal phase matching conditions, large coherence length, combined with uniform field enhancement entail the ideal conditions to achieve giant second-harmonic conversion efficiencies for backward and forward signals. It is shown that these conditions are particularly well suited to enhance nonlinear effects over a wide range of frequencies, leading to efficient electromagnetic wave mixers and parametric amplifiers.6 pagesen-USThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.©2014 The American Physical SocietyText