INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Tunable electromagnetically induced transparency at terahertz frequencies in coupled graphene metamaterial |
Ding Guo-Wen (丁国文)a, Liu Shao-Bin (刘少斌)a, Zhang Hai-Feng (章海锋)a b, Kong Xiang-Kun (孔祥鲲)a c, Li Hai-Ming (李海明)a, Li Bing-Xiang (李炳祥)a, Liu Si-Yuan (刘思源)a, Li Hai (李海)b |
a Key Laboratory of Radar Imaging and Microwave Photonics of Ministry of Education, Nanjing University of Aeronauticsand Astronautics, Nanjing 210016, China; b Nanjing Artillery Academy, Nanjing 211132, China; c State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China |
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Abstract A graphene-based metamaterial with tunable electromagnetically induced transparency (EIT)-like transmission is numerically studied in this paper. The proposed structure consists of a graphene layer composed of coupled cut-wire pairs printed on a substrate. The simulation confirms that an EIT-like transparency window can be observed due to indirect coupling in a terahertz frequency range. More importantly, the peak frequency of the transmission window can be dynamically controlled over a broad frequency range by varying the Fermi energy levels of the graphene layer through controlling the electrostatic gating. The proposed metamaterial structure offers an additional opportunity to design novel applications such as switches or modulators.
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Received: 25 April 2015
Revised: 06 July 2015
Accepted manuscript online:
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PACS:
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81.05.ue
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(Graphene)
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78.67.Pt
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(Multilayers; superlattices; photonic structures; metamaterials)
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41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61307052), the Youth Funding for Science & Technology Innovation in Nanjing University of Aeronautics and Astronautics, China (Grant No. NS2014039), the Chinese Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 20123218110017), the Innovation Program for Graduate Education of Jiangsu Province, China (Grant Nos. KYLX_0272, CXZZ13_0166, and CXLX13_155), the Open Research Program in National State Key Laboratory of Millimeter Waves of China (Grant No. K201609), and the Fundamental Research Funds for the Central Universities of China (Grant No. kfjj20150407). |
Corresponding Authors:
Liu Shao-Bin
E-mail: plrg@nuaa.edu.cn
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Cite this article:
Ding Guo-Wen (丁国文), Liu Shao-Bin (刘少斌), Zhang Hai-Feng (章海锋), Kong Xiang-Kun (孔祥鲲), Li Hai-Ming (李海明), Li Bing-Xiang (李炳祥), Liu Si-Yuan (刘思源), Li Hai (李海) Tunable electromagnetically induced transparency at terahertz frequencies in coupled graphene metamaterial 2015 Chin. Phys. B 24 118103
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