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Investigation of broadband terahertz generation from metasurface

TitleInvestigation of broadband terahertz generation from metasurface
Publication TypeJournal Article
Year of Publication2018
AuthorsFang, M, Niu, KK, Huang, ZX, Sha, WEI, Wu, XL, Koschny, T, Soukoulis, CM
JournalOptics Express
Date Published05
Type of ArticleArticle
ISBN Number1094-4087
Accession NumberWOS:000433333700047
Keywords3rd-harmonic generation, magnetic metamaterials, optics, quantum-cascade lasers, technology

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. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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