中国物理B ›› 2018, Vol. 27 ›› Issue (9): 98101-098101.doi: 10.1088/1674-1056/27/9/098101

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Dynamically tunable terahertz passband filter based on metamaterials integrated with a graphene middle layer

MaoSheng Yang(杨茂生), LanJu Liang(梁兰菊), DeQuan Wei(韦德泉), Zhang Zhang(张璋), Xin Yan(闫昕), Meng Wang(王猛), JianQuan Yao(姚建铨)   

  1. 1 School of Opto-electronics Engineering, Zaozhuang University, Zaozhuang 277160, China;
    2 College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China;
    3 Key Laboratory of Optoelectronic Information Science and Technology(Ministry of Education), Tianjin University, Tianjin 300072, China;
    4 Key Laboratory of Optoelectronic Information Processing and Display in Universities of Shandong, Zaozhuang University, Zaozhuang 277160, China
  • 收稿日期:2018-02-02 修回日期:2018-06-24 出版日期:2018-09-05 发布日期:2018-09-05
  • 通讯作者: LanJu Liang, DeQuan Wei E-mail:lianglanju123@163.com;13561121758@163.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61701434, 61735010, and 61675147), the Open Fund of the Key Laboratory of Optoelectronic Information Technology, Ministry of Education (Tianjin University), China, the Key Laboratory of Optoelectronic Information Functional Materials and Micro-Nano devices in Zaozhuang, China, the China Postdoctoral Science Foundation (Grant No. 2015M571263), the Natural Science Foundation of Shandong Province, China (Grant Nos. ZR2017MF005 and ZR2018LF001), Project of Shandong Province Higher Education Science and Technology Program, China (Grant No. J17KA087), the Program of Independent and Achievement Transformation Plan for Zaozhuang, China (Grant Nos. 2016GH19 and 2016GH31), and Zaozhuang Engineering Research Center of Terahertz, China.

Dynamically tunable terahertz passband filter based on metamaterials integrated with a graphene middle layer

MaoSheng Yang(杨茂生)1,2,4, LanJu Liang(梁兰菊)1,2,3,4, DeQuan Wei(韦德泉)1,4, Zhang Zhang(张璋)1,2,3,4, Xin Yan(闫昕)1,2,3,4, Meng Wang(王猛)1,4, JianQuan Yao(姚建铨)1,3,4   

  1. 1 School of Opto-electronics Engineering, Zaozhuang University, Zaozhuang 277160, China;
    2 College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China;
    3 Key Laboratory of Optoelectronic Information Science and Technology(Ministry of Education), Tianjin University, Tianjin 300072, China;
    4 Key Laboratory of Optoelectronic Information Processing and Display in Universities of Shandong, Zaozhuang University, Zaozhuang 277160, China
  • Received:2018-02-02 Revised:2018-06-24 Online:2018-09-05 Published:2018-09-05
  • Contact: LanJu Liang, DeQuan Wei E-mail:lianglanju123@163.com;13561121758@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61701434, 61735010, and 61675147), the Open Fund of the Key Laboratory of Optoelectronic Information Technology, Ministry of Education (Tianjin University), China, the Key Laboratory of Optoelectronic Information Functional Materials and Micro-Nano devices in Zaozhuang, China, the China Postdoctoral Science Foundation (Grant No. 2015M571263), the Natural Science Foundation of Shandong Province, China (Grant Nos. ZR2017MF005 and ZR2018LF001), Project of Shandong Province Higher Education Science and Technology Program, China (Grant No. J17KA087), the Program of Independent and Achievement Transformation Plan for Zaozhuang, China (Grant Nos. 2016GH19 and 2016GH31), and Zaozhuang Engineering Research Center of Terahertz, China.

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摘要：

The dynamic tunability of a terahertz (THz) passband filter was realized by changing the Fermi energy (EF) of graphene based on the sandwiched structure of metal-graphene-metal metamaterials (MGMs). By using plane wave simulation, we demonstrated that the central frequency (f0) of the proposed filter can shift from 5.04 THz to 5.71 THz; this shift is accompanied by a 3 dB bandwidth (Δf) decrease from 1.82 THz to 0.01 THz as the EF increases from 0 to 0.75 eV. Additionally, in order to select a suitable control equation for the proposed filter, the curves of Δf and f0 under different graphene EF were fitted using five different mathematical models. The fitting results demonstrate that the DoseResp model offers accurate predictions of the change in the 3 dB bandwidth, and the Quartic model can successfully describe the variation in the center frequency of the proposed filter. Moreover, the electric field and current density analyses show that the dynamic tuning property of the proposed filter is mainly caused by the competition of two coupling effects at different graphene EF, i.e., graphene-polyimide coupling and graphene-metal coupling. This study shows that the proposed structures are promising for realizing dynamically tunable filters in innovative THz communication systems.

关键词: metamaterial, terahertz, filter, mathematical model, tunability, graphene

Abstract:

The dynamic tunability of a terahertz (THz) passband filter was realized by changing the Fermi energy (EF) of graphene based on the sandwiched structure of metal-graphene-metal metamaterials (MGMs). By using plane wave simulation, we demonstrated that the central frequency (f0) of the proposed filter can shift from 5.04 THz to 5.71 THz; this shift is accompanied by a 3 dB bandwidth (Δf) decrease from 1.82 THz to 0.01 THz as the EF increases from 0 to 0.75 eV. Additionally, in order to select a suitable control equation for the proposed filter, the curves of Δf and f0 under different graphene EF were fitted using five different mathematical models. The fitting results demonstrate that the DoseResp model offers accurate predictions of the change in the 3 dB bandwidth, and the Quartic model can successfully describe the variation in the center frequency of the proposed filter. Moreover, the electric field and current density analyses show that the dynamic tuning property of the proposed filter is mainly caused by the competition of two coupling effects at different graphene EF, i.e., graphene-polyimide coupling and graphene-metal coupling. This study shows that the proposed structures are promising for realizing dynamically tunable filters in innovative THz communication systems.

Key words: metamaterial, terahertz, filter, mathematical model, tunability, graphene

中图分类号:  (Metamaterials for chiral, bianisotropic and other complex media)

  • 81.05.Xj
42.25.Fx (Diffraction and scattering) 84.30.Vn (Filters) 43.58.Kr (Spectrum and frequency analyzers and filters; acoustical and electrical oscillographs; photoacoustic spectrometers; acoustical delay lines and resonators)