中国物理B ›› 2021, Vol. 30 ›› Issue (3): 34102-.doi: 10.1088/1674-1056/abca23

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  • 收稿日期:2020-09-18 修回日期:2020-10-19 接受日期:2020-11-13 出版日期:2021-02-22 发布日期:2021-03-05

Design and verification of a broadband highly-efficient plasmonic circulator

Jianfei Han(韩建飞)1, Shu Zhen(甄姝)1, Weihua Wang(王伟华)1, Kui Han(韩奎)1, Haipeng Li(李海鹏)1, Lei Zhao(赵雷)2, and Xiaopeng Shen(沈晓鹏)1,†   

  1. 1 School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China; 2 School of Information and Control Engineering, China University of Mining and Technology, Xuzhou 221116, China
  • Received:2020-09-18 Revised:2020-10-19 Accepted:2020-11-13 Online:2021-02-22 Published:2021-03-05
  • Contact: †Corresponding author. E-mail: xpshen@cumt.edu.cn
  • Supported by:
    Project supported by the Six-Talent-Peaks Project in Jiangsu Province of China (Grant No. XYDXX-072) and the National Natural Science Foundation of China (Grant No. 61372048).

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Abstract: Circulators play a significant role in radar and microwave communication systems. This paper proposes a broadband and highly efficient plasmonic circulator, which consists of spoof surface plasmon polaritons (SSPPs) waveguides and ferrite disks to support non-reciprocal mode coupling. The simulated performance of symmetrically designed circulator shows that it has an insertion loss of roughly 0.5 dB while the isolation and return loss is more than 12 dB in the frequency range of 6.0 GHz-10.0 GHz (relative bandwidth of 50%). Equivalent circuit model has been proposed to explain the operating mechanism of the plasmonic circulator. The equivalent circuit model, numerical simulations, and experimental results are consistent with each other, which demonstrates the good performance of the proposed plasmonic circulator.

Key words: plasmonic, circulator, spoof surface plasmon polaritons, ferrite

中图分类号:  (Electromagnetic wave propagation; radiowave propagation)

  • 41.20.Jb
73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)) 84.40.Az (Waveguides, transmission lines, striplines) 85.70.Ge (Ferrite and garnet devices)