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This paper presents a theoretical framework for designing and optimizing graphene-based RIS for THz wave manipulation. The RIS configuration consists of an array of circular graphene meta-atoms on a silicon substrate grounded with a metal. Numerical analysis shows that graphene-based RIS achieves nearly perfect reflection, with close to 100% efficiency across 4.8 to 8 THz frequencies. Reflection remains insensitive to polarization angle (ϕ) and incidence angle (θ) up to 60° for both transverse electric (TE) and transverse magnetic (TM) modes. Additionally, near 100% absorption is achieved by reconfiguring the unit cell response via changes in graphene’s chemical potential. These results show that graphene-based RIS can effectively manage THz wave propagation in wireless environment. This strategy will not only improve the performance and stability of future THz-based communication systems but also provide unparalleled data rates and connectivity.

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Simulation Analysis of Graphene-Based RIS for Next Generation Wireless Communication

  • 会议论文

  • 发表日期：

    2026年

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  • Abhishek Rana,
  • Hem Dutt Joshi,
  • Kulbir Singh,
  • Atul Kumar,
  • Hari Shankar Singh

摘要

This paper presents a theoretical framework for designing and optimizing graphene-based RIS for THz wave manipulation. The RIS configuration consists of an array of circular graphene meta-atoms on a silicon substrate grounded with a metal. Numerical analysis shows that graphene-based RIS achieves nearly perfect reflection, with close to 100% efficiency across 4.8 to 8 THz frequencies. Reflection remains insensitive to polarization angle (ϕ) and incidence angle (θ) up to 60° for both transverse electric (TE) and transverse magnetic (TM) modes. Additionally, near 100% absorption is achieved by reconfiguring the unit cell response via changes in graphene’s chemical potential. These results show that graphene-based RIS can effectively manage THz wave propagation in wireless environment. This strategy will not only improve the performance and stability of future THz-based communication systems but also provide unparalleled data rates and connectivity.