%0 Journal Article %@ 1094-4087 %A Fang, M %A Niu, K %A Huang, Z %A Sha, WEI %A Wu, X %A Koschny, T %A Soukoulis, CM %D 2018 %F discovery:10056670 %I OPTICAL SOC AMER %J Optics Express %K Metamaterials, Nonlinear optics, Computational electromagnetic methods %N 11 %P 14241-14250 %T Investigation of broadband terahertz generation from metasurface %U https://discovery.ucl.ac.uk/id/eprint/10056670/ %V 26 %X The nonlinear metamaterials have been shown to provide nonlinear properties with high nonlinear conversion efficiency and in a myriad of light manipulation. Here we study terahertz generation from nonlinear metasurface consisting of single layer nanoscale split-ring resonator array. The terahertz generation due to optical rectification by the second-order nonlinearity of the split-ring resonator is investigated by a time-domain implementation of the hydrodynamic model for electron dynamics in metal. The results show that the nonlinear metasurface enables us to generate broadband terahertz radiation and free from quasi-phase-matching conditions. The proposed scheme provides a new concept of broadband THz source and designing nonlinear plasmonic metamaterials. %Z This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.