Investigation of broadband terahertz generation from metasurface

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 ge...

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Bibliographic Details
Published in:Optics express 2018-05, Vol.26 (11), p.14241-14250
Main Authors: Fang, Ming, Niu, Kaikun, Huang, Zhiaxiang, Sha, Wei E I, Wu, Xianliang, Koschny, Thomas, Soukoulis, Costas M
Format: Article
Language:English
Subjects:
Computational electromagnetic methods
ENGINEERING
MATERIALS SCIENCE
Metamaterials
Nonlinear optics
THz Generation
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Summary: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.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.26.014241