中国物理B ›› 2021, Vol. 30 ›› Issue (12): 127803-127803.doi: 10.1088/1674-1056/ac0cdd

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Tunable wide-angle multi-band mid-infrared linear-to-linear polarization converter based on a graphene metasurface

Lan-Lan Zhang(张兰兰), Ping Li(李萍), and Xiao-Wei Song(宋霄薇)   

  1. School of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang 471000, China
  • 收稿日期:2021-04-14 修回日期:2021-06-08 接受日期:2021-06-21 出版日期:2021-11-15 发布日期:2021-12-01
  • 通讯作者: Lan-Lan Zhang E-mail:zhanglan80515@163.com
  • 基金资助:
    Project supported by the School Youth Fund of Henan University of Science and Technology (Grant No. 2014QN045).

Tunable wide-angle multi-band mid-infrared linear-to-linear polarization converter based on a graphene metasurface

Lan-Lan Zhang(张兰兰), Ping Li(李萍), and Xiao-Wei Song(宋霄薇)   

  1. School of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang 471000, China
  • Received:2021-04-14 Revised:2021-06-08 Accepted:2021-06-21 Online:2021-11-15 Published:2021-12-01
  • Contact: Lan-Lan Zhang E-mail:zhanglan80515@163.com
  • Supported by:
    Project supported by the School Youth Fund of Henan University of Science and Technology (Grant No. 2014QN045).

摘要: We present a high-efficiency tunable wide-angle multi-band reflective linear-to-linear (LTL) polarization converter, which is composed of an array of two L-shaped graphene patches with different sizes. In the mid-infrared region, the proposed converter can transform x-polarized wave into y-polarized wave at four resonant frequencies. The polarization conversion ratios of the four bands reach 94.4%, 92.7%, 99.3%, and 93.1%, respectively. By carefully choosing the geometric parameter, triple-band LTL polarization conversion can also be realized. The three polarization conversion ratios reach 91.50%, 99.20%, and 97.22%, respectively. The influence of incident angle on the performances of the LTL polarization converter is investigated, and it is found that our polarization converter shows the angle insensitivity. Also, the dynamically tunable properties of the proposed polarization converter are numerically studied by changing Fermi energy. All the simulation results are conducted by finite element method.

关键词: metasurface, graphene, polarization converter, multi-band

Abstract: We present a high-efficiency tunable wide-angle multi-band reflective linear-to-linear (LTL) polarization converter, which is composed of an array of two L-shaped graphene patches with different sizes. In the mid-infrared region, the proposed converter can transform x-polarized wave into y-polarized wave at four resonant frequencies. The polarization conversion ratios of the four bands reach 94.4%, 92.7%, 99.3%, and 93.1%, respectively. By carefully choosing the geometric parameter, triple-band LTL polarization conversion can also be realized. The three polarization conversion ratios reach 91.50%, 99.20%, and 97.22%, respectively. The influence of incident angle on the performances of the LTL polarization converter is investigated, and it is found that our polarization converter shows the angle insensitivity. Also, the dynamically tunable properties of the proposed polarization converter are numerically studied by changing Fermi energy. All the simulation results are conducted by finite element method.

Key words: metasurface, graphene, polarization converter, multi-band

中图分类号:  (Optical properties of graphene)

  • 78.67.Wj
61.48.Gh (Structure of graphene) 42.81.Gs (Birefringence, polarization)