Optical Communication Technology, Volume. 48, Issue 5, 108(2024)

Research on circular dichroism and dynamic control of bilayer graphene chiral metasurfaces

SONG Xiaoxian1,2, ZHANG Yu2, GUO Xuewen2, ZHANG Haiting2, ZHANG Jingjing2, DAI Zijie2, LIANG Ying2, and YAO Jianquan1,2
Author Affiliations
  • 1College of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China
  • 2School of Mechanical and Engineering, Jiangsu University, Zhenjiang Jiangsu 212013, China
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    This paper focuses on the research of graphene chiral metasurfaces, which is mainly concentrated in the mid-infrared band, while there are relatively few studies on devices in the terahertz band, and the problem of insufficient circular dichroism generated by the non-intrinsic structure of graphene. Based on the properties of graphene, a double-layer graphene chiral metasur-face structure is designed. There is a certain angle between the upper and lower graphene patterns of the structure. By adjusting the size of this angle and the thickness of the intermediate silicon dioxide layer, the circular dichroism of the metasurface structure is studied. In addition, the dynamic tuning ability of the metasurface structure is analyzed by changing the Fermi level and relaxation time of graphene. The simulation results show that the metasurface structure can achieve circular dichroism in the terahertz frequency band and has the ability of dynamic tuning.

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    SONG Xiaoxian, ZHANG Yu, GUO Xuewen, ZHANG Haiting, ZHANG Jingjing, DAI Zijie, LIANG Ying, YAO Jianquan. Research on circular dichroism and dynamic control of bilayer graphene chiral metasurfaces[J]. Optical Communication Technology, 2024, 48(5): 108

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    Paper Information

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    Received: Jul. 26, 2024

    Accepted: Jan. 16, 2025

    Published Online: Jan. 16, 2025

    The Author Email:

    DOI:10.13921/j.cnki.issn1002-5561.2024.05.018

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