Strong and broadband terahertz absorber using SiO2-based metamaterial structure

doi:10.1088/1674-1056/23/4/047803

中国物理B ›› 2014, Vol. 23 ›› Issue (4): 47803-047803.doi: 10.1088/1674-1056/23/4/047803

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Strong and broadband terahertz absorber using SiO₂-based metamaterial structure

莫漫漫^a, 文岐业^a, 陈智^b, 杨青慧^a, 邱东鸿^a, 李胜^a, 荆玉兰^a, 张怀武^a

a State Key Laboratory of Electronic Films and Integrated Devices, University of ElectronicScience and Technology of China, Chengdu 610054, China;
b National Key Laboratory of Science and Technology of Communication. University of ElectronicScience and Technology of China, Chengdu 610054, China

收稿日期:2013-08-08 修回日期:2013-08-23 出版日期:2014-04-15 发布日期:2014-04-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 61131005), the KeyProject of the Chinese Ministry of Education (Grant No. 313013), the New Century Excellent Talent Foundation, China (Grant No. NCET-11-0068), the Sichuan Youth Science and Technology Foundation, China (Grant No. 2011JQ0001), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20110185130002), and the THz Science and Technology Foundation from the China Academy of Engineering Physics, China (Grant No. CAEPTHZ201207).

Strong and broadband terahertz absorber using SiO₂-based metamaterial structure

Mo Man-Man (莫漫漫)^a, Wen Qi-Ye (文岐业)^a, Chen Zhi (陈智)^b, Yang Qing-Hui (杨青慧)^a, Qiu Dong-Hong (邱东鸿)^a, Li Sheng (李胜)^a, Jing Yu-Lan (荆玉兰)^a, Zhang Huai-Wu (张怀武)^a

a State Key Laboratory of Electronic Films and Integrated Devices, University of ElectronicScience and Technology of China, Chengdu 610054, China;
b National Key Laboratory of Science and Technology of Communication. University of ElectronicScience and Technology of China, Chengdu 610054, China

Received:2013-08-08 Revised:2013-08-23 Online:2014-04-15 Published:2014-04-15
Contact: Wen Qi-Ye E-mail:qywen@uestc.edu.cn;qywen@163.com
About author:78.20.Ci; 77.22.Ch; 78.47.-p
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 61131005), the KeyProject of the Chinese Ministry of Education (Grant No. 313013), the New Century Excellent Talent Foundation, China (Grant No. NCET-11-0068), the Sichuan Youth Science and Technology Foundation, China (Grant No. 2011JQ0001), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20110185130002), and the THz Science and Technology Foundation from the China Academy of Engineering Physics, China (Grant No. CAEPTHZ201207).

摘要/Abstract

摘要： We design and experimentally demonstrate a broadband metamaterial absorber in the terahertz (THz) band based on a periodic array of aluminum (Al) squares with two different sizes. A thin silicon dioxide (SiO₂) film rather than a conventional polyimide (PI) layer is used as a dielectric spacer to separate Al squares from the platinum (Pt) ground plane in our design, which significantly improves the design precision and the feasibility of the device fabrication. The combination of different sizes of Al squares gives rise to an absorption bandwidth of over 210 GHz with an absorption of over 90%. Our results also show that our device is almost polarization-insensitive. It works very well for all azimuthal angles with an absorption of beyond 80%.

关键词: terahertz, metamaterials, absorption, broadband

Abstract: We design and experimentally demonstrate a broadband metamaterial absorber in the terahertz (THz) band based on a periodic array of aluminum (Al) squares with two different sizes. A thin silicon dioxide (SiO₂) film rather than a conventional polyimide (PI) layer is used as a dielectric spacer to separate Al squares from the platinum (Pt) ground plane in our design, which significantly improves the design precision and the feasibility of the device fabrication. The combination of different sizes of Al squares gives rise to an absorption bandwidth of over 210 GHz with an absorption of over 90%. Our results also show that our device is almost polarization-insensitive. It works very well for all azimuthal angles with an absorption of beyond 80%.

Key words: terahertz, metamaterials, absorption, broadband

中图分类号: (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))

78.20.Ci

77.22.Ch (Permittivity (dielectric function)) 78.47.-p (Spectroscopy of solid state dynamics)

莫漫漫, 文岐业, 陈智, 杨青慧, 邱东鸿, 李胜, 荆玉兰, 张怀武. Strong and broadband terahertz absorber using SiO₂-based metamaterial structure[J]. 中国物理B, 2014, 23(4): 47803-047803.

Mo Man-Man (莫漫漫), Wen Qi-Ye (文岐业), Chen Zhi (陈智), Yang Qing-Hui (杨青慧), Qiu Dong-Hong (邱东鸿), Li Sheng (李胜), Jing Yu-Lan (荆玉兰), Zhang Huai-Wu (张怀武). Strong and broadband terahertz absorber using SiO₂-based metamaterial structure[J]. Chin. Phys. B, 2014, 23(4): 47803-047803.

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Strong and broadband terahertz absorber using SiO₂-based metamaterial structure

Strong and broadband terahertz absorber using SiO₂-based metamaterial structure

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