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Title: 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 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.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [2] ;  [4] ;  [5]
  1. Anhui University, Hefei (China). Key Laboratory of Intelligent Computing and Signal Processing, Ministry of Education; Ames Lab. and Iowa State Univ., Ames, IA (United States). Department of Physics and Astronomy
  2. Anhui University, Hefei (China). Key Laboratory of Intelligent Computing and Signal Processing, Ministry of Education
  3. Zhejiang University, Hangzhou (China). Key Laboratory of Micro-nano Electronic Devices and Smart Systems of Zhejiang Province, College of Information Science & Electronic Engineering
  4. Ames Lab. and Iowa State Univ., Ames, IA (United States). Department of Physics and Astronomy
  5. Ames Lab. and Iowa State Univ., Ames, IA (United States). Department of Physics and Astronomy ; Institute of Electronic Structure and Lasers (IESL), FORTH, Crete (Greece)
Publication Date:
Report Number(s):
IS-J-9687
Journal ID: ISSN 1094-4087
Grant/Contract Number:
AC02-07CH11358; 320081; 61601166; 61701001; 61701003; 61722101; KJ2017ZD02; KJ2017ZD51
Type:
Accepted Manuscript
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 26; Journal Issue: 11; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Research Org:
Iowa State Univ., Ames, IA (United States); Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; Metamaterials; Nonlinear optics; Computational electromagnetic methods; THz Generation; metamaterials; nonlinear optics; computational electromagnetic methods
OSTI Identifier:
1454572
Alternate Identifier(s):
OSTI ID: 1436970