中国物理B ›› 2018, Vol. 27 ›› Issue (12): 124205-124205.doi: 10.1088/1674-1056/27/12/124205

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Tunable plasmon-induced transparency based on asymmetric H-shaped graphene metamaterials

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

  1. School of Physical Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
  • 收稿日期:2018-07-10 修回日期:2018-08-29 出版日期:2018-12-05 发布日期:2018-12-05
  • 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).

Tunable plasmon-induced transparency based on asymmetric H-shaped graphene metamaterials

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

  1. School of Physical Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
  • Received:2018-07-10 Revised:2018-08-29 Online:2018-12-05 Published:2018-12-05
  • 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:

We propose and numerically demonstrate a tunable plasmon-induced transparency (PIT) phenomenon based on asymmetric H-shaped graphene metamaterials. The tunable PIT effect is realized through varying the applied polarization angles rather than changing the structure geometry. By simply adjusting the polarization angle, the transmission spectra can be controlled between the switch-on state and switch-off state. The physical mechanism of the induced transparency is revealed from magnetic dipole inductive coupling and phase coupling. Importantly, by varying the Fermi energy of the graphene or the refractive index of the substrate, the resonant position of the PIT can be dynamically controlled and the maximum modulation depths can reach up to 60.7%. The sensitivity (nm/RIU) of the graphene structure, which is the shift of resonance wavelength per unit change of refractive index, is 5619.56 nm/RIU. Moreover, we also extend our research to the x-axis symmetric H-shaped structure, and the tunable PIT transmission window can also be realized. The physical mechanism of the induced transparency is revealed from the electric dipole hybridization coupling. Our designed H-shaped graphene-based structures is a promising candidate for compact elements such as tunable sensors, switches and slow-light devices.

关键词: plasmon-induced transparency, graphene, polarization, optical filter

Abstract:

We propose and numerically demonstrate a tunable plasmon-induced transparency (PIT) phenomenon based on asymmetric H-shaped graphene metamaterials. The tunable PIT effect is realized through varying the applied polarization angles rather than changing the structure geometry. By simply adjusting the polarization angle, the transmission spectra can be controlled between the switch-on state and switch-off state. The physical mechanism of the induced transparency is revealed from magnetic dipole inductive coupling and phase coupling. Importantly, by varying the Fermi energy of the graphene or the refractive index of the substrate, the resonant position of the PIT can be dynamically controlled and the maximum modulation depths can reach up to 60.7%. The sensitivity (nm/RIU) of the graphene structure, which is the shift of resonance wavelength per unit change of refractive index, is 5619.56 nm/RIU. Moreover, we also extend our research to the x-axis symmetric H-shaped structure, and the tunable PIT transmission window can also be realized. The physical mechanism of the induced transparency is revealed from the electric dipole hybridization coupling. Our designed H-shaped graphene-based structures is a promising candidate for compact elements such as tunable sensors, switches and slow-light devices.

Key words: plasmon-induced transparency, graphene, polarization, optical filter

中图分类号:  (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)

  • 42.50.Gy
78.67.Pt (Multilayers; superlattices; photonic structures; metamaterials) 61.48.Gh (Structure of graphene)