Multi-band tunable terahertz absorber based on metamaterial
Received:February 05, 2020  Revised:November 13, 2020  download
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Author NameAffiliationE-mail
TONG Yan-Qun Institute of Micro-nano Optoelectronics and Terahertz Technology Jiangsu University Zhenjiang 212013 China
School of Mechanical Engineering Jiangsu University Zhenjiang 212013 China 
tongyanqun@163.com 
WANG Shi-Yan Institute of Micro-nano Optoelectronics and Terahertz Technology Jiangsu University Zhenjiang 212013 China
School of Mechanical Engineering Jiangsu University Zhenjiang 212013 China 
1262782273@qq.com 
SONG Xiao-Xian Institute of Micro-nano Optoelectronics and Terahertz Technology Jiangsu University Zhenjiang 212013 China
School of Mechanical Engineering Jiangsu University Zhenjiang 212013 China
School of Precision Instrument and Optoelectronic Engineering Tianjin University Tianjin 300072 China 
 
YANG Lei School of Mechanical Engineering Jiangsu University Zhenjiang 212013 China  
YAO Jian-Quan Institute of Micro-nano Optoelectronics and Terahertz Technology Jiangsu University Zhenjiang 212013 China
School of Precision Instrument and Optoelectronic Engineering Tianjin University Tianjin 300072 China 
 
YE Yun-Xia Institute of Micro-nano Optoelectronics and Terahertz Technology Jiangsu University Zhenjiang 212013 China
School of Mechanical Engineering Jiangsu University Zhenjiang 212013 China 
 
REN Yun-Peng Institute of Micro-nano Optoelectronics and Terahertz Technology Jiangsu University Zhenjiang 212013 China
School of Mechanical Engineering Jiangsu University Zhenjiang 212013 China 
 
ZHANG Ya-Ting Institute of Micro-nano Optoelectronics and Terahertz Technology Jiangsu University Zhenjiang 212013 China
School of Mechanical Engineering Jiangsu University Zhenjiang 212013 China
School of Precision Instrument and Optoelectronic Engineering Tianjin University Tianjin 300072 China 
 
XIN Shan-Shan School of Mechanical Engineering Jiangsu University Zhenjiang 212013 China  
REN Xu-Dong Institute of Micro-nano Optoelectronics and Terahertz Technology Jiangsu University Zhenjiang 212013 China
School of Mechanical Engineering Jiangsu University Zhenjiang 212013 China 
renxd@mail.ujs.edu.cn 
Abstract:A multi-band tunable terahertz metamaterial absorber is proposed. In the structure of the metamaterial absorber, a photosensitive semiconductor silicon material was added and designed a special top metal resonator, analyzed the influence of the parameters such as the opening length, line width and dielectric layer thickness on the absorption spectral characteristics of the terahertz metamaterial absorber. According to the relationship between illumination and the conductivity of photosensitive semiconductor silicon, studied the frequency tuning characteristics of the terahertz metamaterial absorber. The simulation results obtain 12 absorption frequency modulations in the terahertz band, the absorption rate of 10 absorption peaks of them exceeds 90% near perfect absorption, and 6 absorptions rate up to 99% perfect absorption. Moreover, the absorptivity modulation depth and relative bandwidth reaches 85.9% and 85.5% respectively, with strong tunable characteristics. The photo excited terahertz metamaterial absorber has a simple structure, multi-band tunable and perfect absorption characteristics, and expands the application range of the absorber.
keywords:terahertz absorber  metamaterials  photo excited  multi-band tunable
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Copyright:《Journal of Infrared And Millimeter Waves》