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Investigation of broadband terahertz generation from metasurface

Fang, M; Niu, K; Huang, Z; Sha, WEI; Wu, X; Koschny, T; Soukoulis, CM; (2018) Investigation of broadband terahertz generation from metasurface. Optics Express , 26 (11) pp. 14241-14250. 10.1364/OE.26.014241. Green open access

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Abstract

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.

Type: Article
Title: Investigation of broadband terahertz generation from metasurface
Open access status: An open access version is available from UCL Discovery
DOI: 10.1364/OE.26.014241
Publisher version: https://doi.org/10.1364/OE.26.014241
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Metamaterials, Nonlinear optics, Computational electromagnetic methods
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: http://discovery.ucl.ac.uk/id/eprint/10056670
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