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arXiv · 1806.00774

Investigation of broadband terahertz generation from metasurface

Ming Fang·Kaikun Niu·Zhiaxiang Huang·Wei E. I. Sha·Xianliang Wu·Thomas Koschny·Costas M. Soukoulis
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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.

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Ming Fang, Kaikun Niu, Zhiaxiang Huang, Wei E. I. Sha, Xianliang Wu, Thomas Koschny, Costas M. Soukoulis. 2018-06-03. Investigation of broadband terahertz generation from metasurface. https://doi.org/10.1364/oe.26.014241

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