Investigation of broadband terahertz generation from metasurface.
Opt Express
; 26(11): 14241-14250, 2018 May 28.
Article
em En
| MEDLINE
| ID: mdl-29877464
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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MEDLINE
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En
Ano de publicação:
2018
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Article