中国物理B ›› 2019, Vol. 28 ›› Issue (2): 26102-026102.doi: 10.1088/1674-1056/28/2/026102

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Dynamically tunable optical properties in graphene-based plasmon-induced transparency metamaterials

Wei Jia(贾微), Pei-Wen Ren(任佩雯), Yu-Chen Tian(田雨宸), Chun-Zhen Fan(范春珍)   

  1. School of Physical Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
  • 收稿日期:2018-09-09 修回日期:2018-11-09 出版日期:2019-02-05 发布日期:2019-02-05
  • 通讯作者: Chun-Zhen Fan E-mail:chunzhen@zzu.edu.cn
  • 基金资助:
    Project supported by the Key Science and Technology Research Project of Henan Province, China (Grant Nos. 162102210164 and 1721023100107) and the Natural Science Foundation of Henan Educational Committee, China (Grant No. 17A140002).

Dynamically tunable optical properties in graphene-based plasmon-induced transparency metamaterials

Wei Jia(贾微), Pei-Wen Ren(任佩雯), Yu-Chen Tian(田雨宸), Chun-Zhen Fan(范春珍)   

  1. School of Physical Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
  • Received:2018-09-09 Revised:2018-11-09 Online:2019-02-05 Published:2019-02-05
  • Contact: Chun-Zhen Fan E-mail:chunzhen@zzu.edu.cn
  • Supported by:
    Project supported by the Key Science and Technology Research Project of Henan Province, China (Grant Nos. 162102210164 and 1721023100107) and the Natural Science Foundation of Henan Educational Committee, China (Grant No. 17A140002).

摘要: A graphene-based metamaterial for THz plasmon induced transparency (PIT) is presented and numerically studied in this paper, which consists of two horizontal graphene strips attached to a continuous vertical wire separately. The calculated surface current distributions demonstrate that the distinct PIT window results from the near-field coupling of two bright modes. To explore the physical mechanism of PIT effect, we employ the coupled Lorentz oscillator model. The transmission spectra obtained with this model fits well with the simulation results. The performance of the PIT system can be controlled through the geometry parameters of graphene strips. Moreover, the transparency window can be dynamically tuned by varying the Fermi energy and the carrier mobility of the graphene strips. The slow light effect is also explored in our proposed structure and it can achieve 1.25 ps when Fermi energy is 1.3 eV. Finally, the position of the transmission window with the variation of the nearby medium refractive index is examined. Such a proposed graphene-based PIT system may have great potential applications in photonic devices.

关键词: plasmon-induced transparency, graphene, tunable

Abstract: A graphene-based metamaterial for THz plasmon induced transparency (PIT) is presented and numerically studied in this paper, which consists of two horizontal graphene strips attached to a continuous vertical wire separately. The calculated surface current distributions demonstrate that the distinct PIT window results from the near-field coupling of two bright modes. To explore the physical mechanism of PIT effect, we employ the coupled Lorentz oscillator model. The transmission spectra obtained with this model fits well with the simulation results. The performance of the PIT system can be controlled through the geometry parameters of graphene strips. Moreover, the transparency window can be dynamically tuned by varying the Fermi energy and the carrier mobility of the graphene strips. The slow light effect is also explored in our proposed structure and it can achieve 1.25 ps when Fermi energy is 1.3 eV. Finally, the position of the transmission window with the variation of the nearby medium refractive index is examined. Such a proposed graphene-based PIT system may have great potential applications in photonic devices.

Key words: plasmon-induced transparency, graphene, tunable

中图分类号:  (Structure of graphene)

  • 61.48.Gh
42.79.Hp (Optical processors, correlators, and modulators) 78.67.Pt (Multilayers; superlattices; photonic structures; metamaterials) 42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)